Chatham (/ˈtʃætəm/) is a town in Barnstable County, Massachusetts, United States. Chatham is located at the southeastern tip of Cape Cod and has historically been a fishing community. First settled by the English in 1664, the township was originally called Monomoit based on the indigenous population's term for the region. Chatham was incorporated as a town on June 11, 1712, and has become a summer resort area. The population was 6,594 at the 2020 census and can swell to 25,000 during the summer months. There are four villages that comprise the town, those being Chatham (CDP), South Chatham, North Chatham, and West Chatham. Chatham is home to the Monomoy National Wildlife Refuge and the decommissioned Monomoy Point Light, both located on Monomoy Island. A popular attraction is the Chatham Light, which is an operational lighthouse that is operated by the United States Coast Guard.

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Native American tribes who lived in the area before European colonization included the Nauset, specifically the Manomoy or Monomoy people. The expansive lands over which they roamed were known to them as Manamoyik or Monomoit. Explorer Samuel de Champlain landed there in October 1606 at a place he christened "Port Fortuné", where conflict arose with the Nauset. Twelve years later, another group of Europeans gave it the name "Sutcliffe's Inlets". Neither name stuck, and the location was not permanently occupied by Europeans until English settlers reached Monomoit in 1664. The town was incorporated on June 11, 1712, at which point it was renamed after Chatham, Kent, England. Its territory expanded with the annexation of Strong Island and its vicinity on February 7, 1797.

Located at the "elbow" of Cape Cod, Chatham became a shipping, fishing, and whaling center. It has a considerable number of 18th-century buildings, whose charm helped it develop into a popular summer resort.

Chatham is home to the Chatham Lighthouse, which was established by President Thomas Jefferson in 1808 to protect the ships circling the Cape. The 1808 towers were replaced in 1841 by twin brick towers that were eventually lost to erosion. They were rebuilt in 1877 out of cast iron, across the street from their original location. The northern of the two was moved to Eastham to become the Nauset Light in 1923. Today, the keeper's house is home to a Coast Guard station which patrols the waters of the Atlantic and Nantucket Sound from Wellfleet to West Yarmouth.

The first reforesting project in America took place on Great Hill in 1821 when Selectmen had pine trees and beach grass planted to prevent erosion and to keep sand from blowing over the village.

Although urban sprawl has invaded the Cape, the town of Chatham still boasts a quaint and walkable Main Street, home to numerous family-owned and -operated shops, restaurants, and businesses. During the summer, concerts are held in a gazebo in Late Gould Park on Main Street. The town also hosts the Chatham Anglers baseball team as part of the Cape Cod Baseball League on the peninsula. The League is for collegiate-age players.

Chatham, like much of Cape Cod, suffers from an exodus of young people and young families due to high housing prices and a lack of social and professional opportunities. The majority of homes in Chatham sit empty in the winter months until the summer when second-home owners come to use their summer/vacation homes. Some are used as weekly rentals for tourists. As of June 1, 2023, the average listing price for a home in Chatham was over $1.1 million US dollars.

In summer, Chatham grows to a population of an estimated 30,000, making facilities overcrowded, and there is limited parking in the Main Street Business District. Parking for the beaches is also limited, and the town's most popular beach, Lighthouse Beach, has only off-street parking.

• Atwood House (1752)
• Caleb Nickerson House (1772)
• Chatham Railroad Museum (1887)
• Josiah Mayo House (c. 1820) chathamconservationfoundation.org
• Chatham Marconi Maritime Center (1914)
• Chatham Windmill (1797)
• Chatham Lighthouse (1808)
• Eldredge Public Library (1896)

The town occupies the southeast corner (the "elbow") of Cape Cod. The town's villages include Chatham proper, Chatham Port, North Chatham, West Chatham, and South Chatham (west of West Chatham). Chatham is bordered by Harwich to the west, Pleasant Bay and Orleans to the north, the Atlantic Ocean to the east, and Nantucket Sound to the south. The town is 35 miles (56 km) south of Provincetown and east of the Sagamore Bridge, 20 miles (32 km) east of Barnstable, and 85 miles (137 km) southeast of Boston.

According to the United States Census Bureau, the town has a total area of 24.4 square miles (63.2 km), of which 16.1 square miles (41.8 km) is land and 8.3 square miles (21.4 km), or 33.88%, is water.

The mainland portion of the town is typical of Cape Cod, with several ponds, brooks, rivers, harbors, and inlets around the town. The town includes two narrow strips of land that serve as a barrier between the Atlantic and the mainland; the northern of these is the southern part of the Cape Cod National Seashore. There are several islands, including Strong Island, Tern Island (which is a sanctuary), Morris Island, Stage Island, and Monomoy Island, a 7.25-mile-long (11.67 km) island south of the corner of the town which is home to the Monomoy National Wildlife Refuge. Erosion has changed the region over the years—for example, an island named Slut's Bush once existed until it vanished underwater by the mid-19th century.

According to the Köppen climate classification system, Chatham, Massachusetts has a warm-summer, wet year-round, humid continental climate (Dfb). Dfb climates are characterized by at least one month having an average mean temperature ≤ 32.0 °F (≤ 0.0 °C), at least four months with an average mean temperature ≥ 50.0 °F (≥ 10.0 °C), all months with an average mean temperature ≤ 71.6 °F (≤ 22.0 °C), and no significant precipitation difference between seasons. The average seasonal (Nov-Apr) snowfall total is approximately 30 inches (76 cm). The average snowiest month is February, which corresponds with the annual peak in nor'easter activity. The plant hardiness zone is 7b, with an average annual extreme minimum air temperature of 5.2 °F (–14.9 °C).

The area surrounding Chatham is home to diverse flora and fauna, including many species that rely on the wetlands for survival. The salt marshes and lakes that exist in the region due to glacial action from the last ice age are essential habitats for many species, such as ospreys (Pandion haliaetus) and striped bass (Morone saxatilis). These wetlands not only promote biodiversity but also act as natural filters, retaining particulates and purifying the water that flows into nearby estuaries and bays. However, Chatham's beaches have experienced significant vegetation loss in recent decades due to both natural and human causes. Despite this, the beaches remain important nesting sites for various species of sea turtles and shorebirds, such as the Piping Plover (Charadrius melodus), while the waters off the coast are rich in marine life, including seals (Halichoerus grypus), whales, and sharks, such as the great white shark (Carcharodon carcharias). In fact, the prevalence of sharks in the waters surrounding Chatham has resulted in its reputation as a hub of great white activity and shark attacks. To help protect and preserve the local flora and fauna, several conservation areas and nature preserves have been established in Chatham, including Monomoy Island, which provides an important breeding ground for the Piping Plover.

According to the A. W. Kuchler U.S. Potential natural vegetation Types, Chatham, Massachusetts would primarily contain a Northeastern Oak/Pine (110) vegetation type with a Southern Mixed Forest (26) vegetation form.

All five roads that exit Chatham cross into Harwich. The two state routes that pass through the town are Route 28 and the southern end of Route 137. Route 28 circles through the center of town before exiting and heading north toward Route 6A, joining that route until the roads end at the Orleans Rotary.

Rail service no longer extends to the town; the former rail bed is a bicycling path and is called the Old Colony Rail Trail. The Old Colony Rail Trail crosses into Chatham and runs through South Chatham and then into West Chatham before ending at Crowell Road near downtown. In addition, another bicycle route passes through the town, starting at the end of the Rail Trail, and providing views of Chatham Fish Pier, Chatham Bars, and Chatham Light.

The town is the home to the Chatham Municipal Airport, which provides local service to other small airports on the Cape and islands. The nearest national and international air service can be reached at Logan International Airport in Boston.

Historical population

Year	Pop.	±%
1850	2,439	—
1860	2,710	+11.1%
1870	2,411	−11.0%
1880	2,250	−6.7%
1890	1,954	−13.2%
1900	1,749	−10.5%
1910	1,564	−10.6%
1920	1,737	+11.1%
1930	1,931	+11.2%
1940	2,136	+10.6%
1950	2,457	+15.0%
1960	3,273	+33.2%
1970	4,554	+39.1%
1980	6,071	+33.3%
1990	6,579	+8.4%
2000	6,625	+0.7%
2010	6,125	−7.5%
2020	6,594	+7.7%
2023*	6,685	+1.4%
* = population estimate.

As of the census of 2000, there were 6,625 people, 3,160 households, and 1,886 families residing in the town. The population density was 408.4 inhabitants per square mile (157.7/km). At the time of the census, there were 6,743 housing units at an average density of 415.7 per square mile (160.5/km). The racial makeup of the town was 96% White, 1.9% Black or African American, 0.2% Native American, 0.3% Asian, <0.1% Pacific Islander, 0.9% from other races, and 0.8% from two or more races. Hispanic or Latino of any race were 1.0% of the population.

During the summer months (generally Memorial Day through Labor Day), the town's population triples to approximately 20,000, not counting the additional transient tourist population hosted by the town's many hotels, inns, motels, and bed and breakfasts. Tourism and hospitality, along with commercial fishing, make up the town's main industry. The town has a thriving commercial fish pier where dayboats unload fresh fish and lobster.

There were 3,160 households, out of which 15.3% had children under the age of 18 living with them, 51.2% were married couples living together, 6.0% had a female householder with no husband present, and 40.3% were non-families. 34.7% of all households were made up of individuals, and 18.8% had someone living alone who was 65 years of age or older. The average household size was 2.00 and the average family size was 2.52.

In the town, the population was spread out, with 13.3% under the age of 18, 4.4% from 18 to 24, 19.8% from 25 to 44, 28.2% from 45 to 64, and 34.3% who were 65 years of age or older. The median age was 54 years. For every 100 females, there were 89.3 males. For every 100 females age 18 and over, there were 85.4 males.

The local K–12 school system has approximately 700 students, and the average high school grade size is between 30 and 40 students.

The median income for a household in the town was $85,519, and the median income for a family was $112,750. Males had a median income of $71,064 versus $40,365 for females. The per capita income for the town was $48,594. About 1.9% of families and 4.8% of the population were below the poverty line, including 5.1% of those under age 18 and 3.7% of those age 65 or over.

Chatham is represented in the Massachusetts House of Representatives as a part of the Fourth Barnstable district, which includes (with the exception of Brewster) all the towns east and north of Harwich on the Cape. The town is represented in the Massachusetts Senate as a part of the Cape and Islands District, which includes all of Cape Cod, Martha's Vineyard, and Nantucket except the towns of Bourne, Falmouth, Sandwich, and a portion of Barnstable.

The Chatham Police Department is the primary law enforcement agency that services the town. It is staffed for 24-hour patrol and is a member of the Cape Cod Regional Law Enforcement Council. The Police station was recently constructed in 2012 and is located on George Ryder Road, across the street from the Chatham Municipal Airport. Troopers from the Massachusetts State Police Troop D Yarmouth barracks provide secondary law enforcement services to the town.

The Chatham Fire/Rescue Department is a 24-hour, fully staffed fire department that provides fire and medical services to the town. The new fire station was constructed in 2016 and is located on Depot Road, across the street from Veteran's Field. Prior to 2012, the fire and police stations were attached and sat on the Depot Road site. The Chatham Fire/Rescue Department also has an unmanned substation on Route 28 in South Chatham; this station houses one engine truck.

On the national level, Chatham is a part of Massachusetts's 9th congressional district and is represented by William R. Keating. The state's senior (Class II) member of the United States Senate, elected in 2012, is Elizabeth Warren. The junior (Class I) senator is Ed Markey.

Chatham is governed by the open town meeting form of government, administered by an elected Board of Selectmen and an appointed Town Manager. The town has four post offices, all located at various points along Route 28. The town is home to the Eldredge Public Library, named for its benefactor Marcellus Eldredge and designed by a student of H. H. Richardson. The town operates several piers, beaches, boat landings, and recreation areas. The nearest hospital is Cape Cod Hospital in Hyannis.

Until 2013, Chatham operated its own school system for the town's 700 students. The Chatham Elementary School served students from pre-kindergarten through fourth grade, the Chatham Middle School served students from fifth through eighth grade, and Chatham High School served grades nine through twelve. Chatham's athletics teams were known as the Blue Devils and wore blue and white. In December 2010, Chatham and the neighboring town of Harwich voted to regionalize their school systems into the Monomoy Regional school system. The Monomoy teams are known as the Sharks, and their colors are navy blue and silver. In March 2013, construction began in Harwich on a new high school to serve the region, expected to open in 2014. High school students may attend Cape Cod Regional Technical School in Harwich free of charge. Other private schools are located in nearby Brewster and Harwich.

Chatham is home to the Chatham Anglers, an amateur collegiate summer baseball team in the Cape Cod Baseball League. The team plays at Veteran's Field and has featured dozens of players who went on to careers in Major League Baseball, such as Thurman Munson, Jeff Bagwell, and Kris Bryant.

Eastward Ho! Golf Course is a notable golf course in town. The course hosted a PGA Tour event, The Cape Cod Open, in the 1930s.

• 
  The Atwood House
• 
  Chatham Lights
• 
  Stage Harbor Light
• 
  Old Linden Tree (April 2012)
• 
  Seals in Chatham Harbor
• 
  Cross Trees
• 
  Chatham Cookware (Summer 2024)
• 
• 

[1]

• Town of Chatham official website
• https://www.chathamconservationfoundation.org/