The University of Massachusetts Amherst (UMass Amherst) is a public land-grant research university in Amherst, Massachusetts, United States. It is the flagship campus of the University of Massachusetts system, and was founded in 1863 as the Massachusetts Agricultural College. It is also a member of the Five College Consortium, along with four other colleges in the Pioneer Valley.

UMass Amherst has the largest undergraduate population in Massachusetts with roughly 24,000 enrolled undergraduates. The university offers academic degrees in 109 undergraduate, 77 master's, and 48 doctoral programs. Programs are coordinated in nine schools and colleges. It is classified among "R1: Doctoral Universities – Very high research activity". According to the National Science Foundation, the university spent $211 million on research and development in 2018.

The university's 21 varsity athletic teams compete in NCAA Division I and are collectively known as the Minutemen and Minutewomen. The university is a member of the Atlantic 10 Conference while playing ice hockey in Hockey East and football as an FBS independent school.

The university was founded in 1863 under the provisions of the Federal Morrill Land-Grant Colleges Act to provide instruction to Massachusetts citizens in "agricultural, mechanical, and military arts." Accordingly, the university was initially named the Massachusetts Agricultural College. In 1867, the college had yet to admit any students and had not completed any buildings but had been through two presidents. That same year, William S. Clark was appointed president of the college and Professor of Botany. He appointed a faculty, coordinated the completion of construction, and, in the fall of 1867, welcomed the first class of approximately 50 students. Clark became the first president to serve long-term after the school's opening. Of the school's founding figures, there are a traditional "founding four" – Clark, Levi Stockbridge, Charles Goessmann, and Henry Hill Goodell.

The original buildings consisted of Old South College, North College, the Chemistry Laboratory, the Boarding House, the Botanic Museum, and the Durfee Plant House.

The fledgling college grew under the leadership of President Henry Hill Goodell. In the 1880s, Goodell implemented an expansion plan, adding the College Drill Hall in 1883, the Old Chapel Library in 1885, and the East and West Experiment Stations in 1886 and 1890.

The early 20th century saw expansion in enrollment and curriculum. The first female student was admitted in 1875 on a part-time basis and the first full-time female student was admitted in 1892. In 1903, Draper Hall was constructed for the dual purpose of a dining hall and female housing. The first female students graduated with the class of 1905. The first dedicated female dormitory, the Abigail Adams House (on the site of today's Lederle Tower), was built in 1920.

By the 1970s, the University continued to grow and gave rise to a shuttle bus service on campus as well as many other architectural additions; this included the Murray D. Lincoln Campus Center complete with a hotel, office space, fine dining restaurant, campus store, and passageway to the parking garage, the W. E. B. Du Bois Library, and the Fine Arts Center.

Over the next two decades, the John W. Lederle Graduate Research Center and the Conte National Polymer Research Center were built and UMass Amherst emerged as a major research facility. The Robsham Memorial Center for Visitors welcomed thousands of guests to campus after its dedication in 1989. For athletic and other large events, the Mullins Center was opened in 1993.

In 2003, Massachusetts State Legislature designated the University of Massachusetts Amherst as a research university and the "flagship campus of the University of Massachusetts system". The university was named a top producer of Fulbright Award winners in the 2008–2009 academic year. Additionally, in 2010, it was named one of the "Top Colleges and Universities Contributing to Teach For America's 2010 Teaching Corps."

From World War II to 2023, the imagery on the official seal of the university was nearly identical to the state flag of the Commonwealth of Massachusetts. That image of the seal has been slowly removed starting in 2011, until March 2023 when a new image of the seal, featuring a profile of the Old Chapel spire, was ratified by the campus.

College/School	Year founded
Stockbridge School of Agriculture	1870
College of Education	1907
College of Humanities & Fine Arts	1915
School of Public Health and Health Sciences	1937
College of Social and Behavioral Sciences	1938
Isenberg School of Management	1947
College of Engineering	1947
Elaine N. Marieb College of Nursing	1953
College of Natural Sciences	2009
Manning College of Information and Computer Sciences	2015
School of Public Policy	2016

Since the University of Massachusetts Amherst was founded as the Massachusetts Agricultural College in 1863, 25 individuals have been at the helm of the institution. Originally, the chief executive of UMass Amherst was a president. When UMass Boston was founded in 1963, it was initially reckoned as an off-site department of the Amherst campus and was headed by a chancellor who reported to the president. A 1970 reorganization transferred day-to-day responsibility for UMass Amherst to a chancellor as well, with both chancellors reporting on an equal basis to the president. The title "President of the University of Massachusetts" now refers to the chief executive of the entire five-campus University of Massachusetts system.

The current Chancellor of the Amherst campus is Javier Reyes. The Chancellor resides in Hillside, the campus residence for chancellors. Reyes is the first person of Hispanic descent to serve as Chancellor of the university.

There are approximately 1,300 full-time faculty at the university. The university is organized into nine schools and colleges and offers 111 bachelor's degrees, 75 master's degrees, and 47 doctoral degrees.

Academic rankings
National
Forbes	126
U.S. News & World Report	58
Washington Monthly	90
WSJ/College Pulse	141
Global
ARWU	151–200
QS	275
THE	84
U.S. News & World Report	175

U.S. News & World Report's 2025 edition of America's Best Colleges ranked UMass Amherst tied for 58th on their list of "Best National Universities", and tied for 26th among 225 public universities in the U.S. UMass Amherst is accredited by the New England Commission of Higher Education.

Commonwealth Honors College at UMass provides students the opportunity to intensify their UMass academic curriculum. Membership in the honors college is not required to graduate from the University with designations such as magna or summa cum laude. In 2013, the University completed the Commonwealth Honors College Residential Community (CHCRC) on campus to serve the college, including classrooms, administration, and housing for 1,500 students and some faculty.

UMass Amherst is part of the Five Colleges Consortium, which allows its students to attend classes, borrow books, work with professors, etc., at four other Pioneer Valley institutions: Amherst, Hampshire, Mount Holyoke, and Smith Colleges.

UMass Amherst holds the license for WFCR, the National Public Radio affiliate for Western Massachusetts. In 2014, the station moved its main operations to the Fuller Building on Main Street in Springfield, but retained some offices in Hampshire House on the UMass campus.

The Community Engagement Program (CEP) offers courses that combine classroom learning and community service. Co-curricular service programs include the Alternative Spring Break, Engineers without Borders, the Legal Studies Civil Rights Clinical Project, the Medical Reserve Corps, Alpha Phi Omega, the Red Cross Club, the Rotaract Club, UCAN Volunteer, and the Veterans and Service Members Association (VSMA).

The White House has named UMass Amherst to the President's Higher Education Community Service Honor Roll for four consecutive years, in recognition of its commitment to volunteering, service learning, and civic engagement. They have also been named a "Community-Engaged University" by the Carnegie Foundation for the Advancement of Teaching.

Student body composition as of May 2, 2022

Race and ethnicity	Total
White	61%	61
Asian	11%	11
Hispanic	8%	8
Foreign national	7%	7
Other	7%	7
Black	5%	5
Economic diversity
Low-income	20%	20
Affluent	80%	80

UMass research activities totaled more than $200 million in fiscal year 2014 ($257,407,928 in today's money). In 2016, the faculty adopted an open-access policy to make its scholarship publicly accessible online.

A team of scientists at UMass led by Vincent Rotello has developed a molecular nose that can detect and identify various proteins. The research appeared in the May 2007 issue of Nature Nanotechnology, and the team is currently focusing on sensors, which will detect malformed proteins made by cancer cells. Also, UMass Amherst scientists Richard Farris, Todd Emrick, and Bryan Coughlin led a research team that developed a synthetic polymer that does not burn. This polymer is a building block of plastic, and the new flame-retardant plastic will not need to have flame-retarding chemicals added to its composition. These chemicals have recently been found in many different areas from homes and offices to fish, and there are environmental and health concerns regarding the additives. The newly developed polymers would not require the addition of potentially hazardous chemicals.

In 2012, the university reported that applications to the school had more than doubled since the Fall of 2003 and increased more than 80% since 2005.

The incoming Class of 2022 had an average high school GPA of 3.90 out of a 4.0 weighted scale, up from an average GPA of 3.83 the year before. The average SAT score of the Class of 2022 was 1294/1600, and on average the students ranked in the top fifth of their high school class. Acceptance to the Commonwealth Honors College program of UMass Amherst is more selective with an average SAT score of 1409/1600 and an average weighted high school GPA of 4.29.

The University's campus is situated on 1,450 acres of historically Pocumtuc land, mainly in the town of Amherst, but also partly in the neighboring town of Hadley. The campus extends about 1 mile (1.6 km) from the Campus Center in all directions and may be thought of as a series of concentric rings, with the innermost ring harboring academic buildings and research labs, surrounded by a ring of the seven residential areas and two university-owned apartment complexes. These include North Apartments, Sylvan, Northeast, Central, Orchard Hill, Southwest, Commonwealth Honors College Residential Complex., The two university-owned apartment complexes, North Village and Lincoln Apartments were demolished, and replaced by a private development called Fieldstone. These are in turn surrounded by a ring of athletic facilities, smaller administration buildings, and parking lots.

The W.E.B. Du Bois Library is one of two library buildings on campus and the tallest academic research library in the world, standing 26 stories above ground and 286 feet (90.32 m) tall. Before its construction in the late 1960s, Goodell Hall was the University library, which was built after the library had outgrown its space in the 1885 "Old Chapel" building. Originally known as Goodell Library, the building was named for Henry H. Goodell, who had served as College Librarian, Professor of Modern Languages and English Literature, and eighth President of the Massachusetts Agricultural College. The Library is well regarded for its innovative architectural design, which incorporates the bookshelves into the structural support of the building. It is home of the memoirs and papers of the distinguished African-American activist and Massachusetts native W. E. B. Du Bois, as well as being the depository for other important collections, such as the papers of the late Congressman Silvio O. Conte. The library's special collections include works on movements for social change, African American history and culture, labor and industry, literature and the arts, agriculture, and the history of the surrounding region.

The Science and Engineering Library is the other library building, located in the Lederle Graduate Research Center Lowrise.

UMass is also home to the DEFA Film Library, the only archive and study collection of East German films outside of Europe. It was founded in 1993 by Barton Byg, professor of film and German Studies, and so named after the Deutsche-Film Aktiengesellschaft, the East German film company founded in 1946. Some years after German reunification, in 1997, an agreement with two German partners led to the creation of a collection of East German film journals along with a large collection of 16mm and 35mm prints of DEFA films. More have been added since.

The Shirley Graham Du Bois Library is located in the New Africa House.

The university has several buildings (constructed in the 1960s and 1970s) of importance in the modernist style, including the Murray D. Lincoln Campus Center and Hotel designed by Marcel Breuer, the Southwest Residential Area designed by Hugh Stubbins Jr. of Skidmore, Owings & Merrill, The Fine Arts Center by Kevin Roche, the W.E.B. Du Bois Library by Edward Durell Stone, and Warren McGuirk Alumni Stadium by Gordon Bunshaft. Many of the older dorms and lecture halls are built in a Georgian Revival style such as French Hall, Fernald Hall, Stockbridge Hall, and Flint Laboratory.

The campus facilities underwent extensive renovations during the late 1990s. New and newly renovated facilities include student apartment complexes, the Hampshire Dining Commons, a library Learning Commons, a School of Management, an Integrated Science Building, a Nursing Building, a Studio Arts Building, the Combined Heat and Power (CHP) generation facility, a track facility, and a Recreation Center. Newly completed construction projects on campus include the new Campus Police Station, the George N. Parks Minuteman Marching Band Building, the Life Sciences Laboratories, and the Integrated Learning Center.

Residential Life at the University of Massachusetts Amherst is one of the largest on-campus housing systems in the United States. Over 14,000 students live in 52 residence halls, while families, staff, and graduate students live in 345 units in two apartment complexes (North Village and Lincoln). The fifty-two residence halls and four undergraduate apartment buildings are grouped into seven separate and very different residential areas: Central, Northeast, Orchard Hill, Southwest, Sylvan, North Apartments, and the Commonwealth Honors College Residential Community (CHCRC).

Located in the central corridor of campus, the Honors Community houses undergraduate members of Commonwealth Honors College.

The University of Massachusetts Amherst campus embarked on a 10-year, $1 billion ($1,613,107,822 in today's money) capital improvement program in 2004, setting the stage for re-visioning the campus's future. This includes construction of $156 million New Science Laboratory Building, $30 million Champions Basketball Center, an $85 million academic building, and $30 million in renovations to the football stadium.

In early 2016, the construction of a new electrical substation located near Tillson Farm was completed. The purpose of the substation is to supply electricity to the university more efficiently and reliably, with estimated savings of $1 million per year ($1,269,551 in today's money). The project was created in partnership with the utilities company Eversource, and cost approximately $26 million ($33,008,319 in today's money).

In April 2017, the University of Massachusetts Amherst officially opened its new Design Building. Previously estimated at $50 million ($62,150,421 in today's money) the 87,000 square feet (8,100 m) facility is the most advanced CLT building in the United States and the largest modern wood building in the northeastern United States.

On April 6, 2018, Mount Ida College announced that the University of Massachusetts would be absorbing its campus. Mount Ida students were given a guaranteed transfer to UMass Dartmouth, and the campus became part of UMass Amherst. The campus was named Mount Ida Campus of UMass Amherst and functions as a satellite campus for UMass Amherst. The campus primarily serves as a hub for Greater Boston-area career preparation and experiential learning opportunities for UMass Amherst students. The programs that are offered at the newly acquired campus will align the strengths of UMass Amherst with the growing demand for talent in areas that drive the Massachusetts economy, including health care, business, computer science, and other STEM specialties.

Campus safety features include controlled dormitory access, emergency telephones, lighted sidewalks, and 24-hour campus police patrols on feet and by vehicle.

Riots occurred after the Boston Red Sox lost the 1986 World Series and won in 2004 and 2007, after the Red Sox were eliminated in the 2003 and 2008 playoffs, after UMass' football team lost in the Division I-AA football championship game in 2006 and after the Patriots first Super Bowl victory over St. Louis in Super Bowl XXXVI. The majority of these riots have been non-violent on the side of the students, except for the 1986 riot in which an argument between hundreds of students intensified into racial altercations where a black student was attacked and beaten to unconsciousness by fifteen to twenty white students according to archives from The Republican. In the wake of these events, students have worked to have open dialogues with the administration and police department about campus safety, the right to gather, the police force, and better methods of crowd control.

UMass Amherst issued an announcement in early 2015 stating, "The University has determined that it will no longer admit Iranian national students to specific programs in the College of Engineering (i.e., Chemical Engineering, Electrical & Computer Engineering, Mechanical & Industrial Engineering) and in the College of Natural Sciences (i.e., Physics, Chemistry, Microbiology, and Polymer Science & Engineering) effective February 1, 2015." The University claims that this announcement was posted because a graduate student entered Iran for a project and was later denied a visa. This event along with urging from legal advisers contributed to the belief that such incidents inhibited their ability to give Iranian students a "full program of education and research for Iranian students" and thus justified changing their admissions policies. The ensuing criticism on and off campus, as well as wide media publicity, changed the minds of school officials. As a result, UMass made a statement on February 18 committing to once again allowing Iranian students to apply to the aforementioned graduate programs. On the same day, an official in the U.S. Department of State stated in an interview that: "U.S. laws and regulations do not prevent Iranian people from traveling to the United States or studying in engineering program of any U.S. academic institutions." UMass Amherst replaced the ban with a policy aimed at designing specific curricula for admitted Iranian nationals based on their needs. While less controversial, this policy has still generated backlash, with one student saying, "This university that's supposed to be so open-minded forcing him to sign a document saying he won't go home and build a bomb or something is just really disappointing to see."

The UMass Amherst campus offers a variety of artistic venues, both performance and visual art. The most prominent is the Fine Arts Center (FAC) built in 1975. The FAC brings theater, music, and dance performances to campus throughout the year into its performance spaces (Concert Hall, Bezanson Recital Hall, and Bowker Auditorium). These include several performance series: Jazz in July Summer Music Program, The Asian Arts & Culture Program, Center Series, and Magic Triangle Series presenting music, dance, and theater performances, cultural arts events, films, talks, workshops, masterclasses, and special family events. University Museum of Contemporary Art in the FAC has a permanent contemporary art collection of about 2,600 works and hosts numerous visual arts exhibitions each year as well as workshops, masterclasses, and artist residencies.

The 9,000-seat Mullins Center, the multi-purpose arena of UMass Amherst hosts a wide variety of performances including speakers, rock concerts, and Broadway shows. In addition, the Music, Dance, and Theater Departments, the Renaissance Center, and multiple student groups dedicated to the arts provide an eclectic menu of performances throughout the year.

The Interdepartmental Program for Film Studies has been organizing the Massachusetts Multicultural Film Festival on campus since 1991.