Ventnor City was incorporated as a city by an act of the New Jersey Legislature on March 17, 1903, from portions of Egg Harbor Township.

S. Bartram Richards, the wife of the secretary-treasurer of the Camden and Atlantic Land Company, suggested the name "Ventnor" for the area then being developed by the company south of Atlantic City, having recently visited the English seaside resort on the Isle of Wight with the same name. The name was chosen in January 1889. The city was formally incorporated by the New Jersey Legislature on March 17, 1903.

Chapter 51 of the laws and Sessions of the State of New Jersey provided the beginning to Ventnor City stating,

"Be it enacted by the Senate and General Assembly of New Jersey that all part or portion of the County of Atlantic, formerly a part of Egg Harbor Township, situated on Absecon Beach, lying between the Westwardly limit of Atlantic City and the Eastwardly limit of South Atlantic City, the Atlantic Ocean on the south as far as the jurisdiction of the State extends, and to the center of Beach Thoroughfare on the North, be, and is hereby constituted as a City of this State, and all of the inhabitants of the State residing within the limits aforesaid be and they are hereby ordained, constituted and declared to be from time to time forever hereafter one body politic and corporate, in fact and in name, by the name, Ventnor City. This act shall take effect immediately, and was approved on March 17, 1903."

The first meeting was held on April 20, 1903, in the Carisbrooke Inn, which was located behind the present City Hall, on Atlantic Avenue between Cambridge and Sacramento Avenues; Carisbrooke is also a place name taken from the Isle of Wight.

According to the United States Census Bureau, Ventnor City city had a total area of 3.52 square miles (9.13 km), including 1.96 square miles (5.07 km) of land and 1.57 square miles (4.06 km) of water (44.52%).

The city is located on 8.1-mile (13.0 km) long Absecon Island, along with Atlantic City to the northeast, and Margate City and Longport on the southwest. The boardwalk runs along the entire 1.7-mile (2.7 km) Ventnor City beach front and is connected to the Atlantic City Boardwalk. It ends at Ventnor City's border with Margate City. The city borders Atlantic City and Margate City.

The 2010 United States census counted 10,650 people, 4,592 households, and 2,645 families in the city. The population density was 5,457.4 per square mile (2,107.1/km). There were 7,829 housing units at an average density of 4,011.8 per square mile (1,549.0/km). The racial makeup was 75.83% (8,076) White, 4.25% (453) Black or African American, 0.47% (50) Native American, 8.68% (924) Asian, 0.05% (5) Pacific Islander, 8.08% (860) from other races, and 2.65% (282) from two or more races. Hispanic or Latino of any race were 18.05% (1,922) of the population.

Of the 4,592 households, 20.9% had children under the age of 18; 39.3% were married couples living together; 13.0% had a female householder with no husband present and 42.4% were non-families. Of all households, 34.6% were made up of individuals and 15.7% had someone living alone who was 65 years of age or older. The average household size was 2.32 and the average family size was 3.00.

18.5% of the population were under the age of 18, 7.8% from 18 to 24, 22.7% from 25 to 44, 31.0% from 45 to 64, and 19.9% who were 65 years of age or older. The median age was 45.5 years. For every 100 females, the population had 94.0 males. For every 100 females ages 18 and older there were 90.0 males.

The Census Bureau's 2006–2010 American Community Survey showed that (in 2010 inflation-adjusted dollars) median household income was $52,465 (with a margin of error of +/− $3,688) and the median family income was $66,467 (+/− $9,437). Males had a median income of $42,560 (+/− $12,377) versus $33,693 (+/− $5,007) for females. The per capita income for the city was $34,790 (+/− $4,057). About 9.0% of families and 10.6% of the population were below the poverty line, including 16.1% of those under age 18 and 10.0% of those age 65 or over.

As of the 2000 United States census there were 12,910 people, 5,480 households, and 3,255 families residing in the city. The population density was 6,023.2 inhabitants per square mile (2,325.6/km). There were 8,009 housing units at an average density of 1, 445.0/km (3,736.6/sq mi). The racial makeup of the city was 77.10% White, 2.94% African American, 0.19% Native American, 7.45% Asian, 0.03% Pacific Islander, 9.37% from other races, and 2.93% from two or more races. Hispanic or Latino of any race were 17.14% of the population.

The most common ethnic groups reported in the 2000 Census in Ventnor City were Italian (22.8%), Irish (15.5%), German (8.7%), English (6.2%), Russian (4.2%), Polish (3.6%).

There were 5,480 households, out of which 23.0% had children under the age of 18 living with them, 42.5% were married couples living together, 12.0% had a female householder with no husband present, and 40.6% were non-families. 33.5% of all households were made up of individuals, and 14.7% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 3.02.

In the city the population was spread out, with 20.0% under the age of 18, 7.1% from 18 to 24, 29.6% from 25 to 44, 23.6% from 45 to 64, and 19.8% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 91.0 males. For every 100 females age 18 and over, there were 87.4 males.

The median income for a household in the city was $42,478, and the median income for a family was $52,701. Males had a median income of $31,300 versus $26,788 for females. The per capita income for the city was $22,631. About 3.4% of families and 7.0% of the population were below the poverty line, including 7.8% of those under age 18 and 6.0% of those age 65 or over.

On September 17, 1968, the existing Mayor-Council form of government was changed to a Commission form of government, under the Walsh Act, one of seven municipalities (of the 564) statewide that use this form. The governing body is comprised of three Commissioners who are elected at-large to serve four-year terms on a concurrent basis in non-partisan elections held as part of the May municipal election. After each election, the three elected commissioners are each assigned a department to oversee and choose one of their members to serve as Mayor.

As of 2024, the members of the Ventnor City Board of Commissioners are Mayor Tim Kriebel (Commissioner of Public Safety), Lance B. Landgraf, Jr.(Commissioner of Public Works and Code Enforcement) and Maria Mento (Commissioner of Revenue and Finance), Ventnor City was incorporated on March 17, 1903.

Beth Holtzman stepped down as mayor in January 2023 as she was moving out of the city. The next month, Lance Landgraf took office as mayor and administrator Maria Mento was appointed to fill Holtzman's seat as commissioner on an interim basis until the November 2023 general election, when voters will choose a candidate to serve the balance of the term of office.

In the 2016 municipal elections, the Imagine Ventnor slate of Beth Holtzman, Tim Kriebel and Lance Landgraf won election in a field of five candidates, with none of the incumbents running for re-election.

In the May 2012 elections, challengers Mike Bagnell (with 1,213 votes) and Frank Sarno (1,175) won seats on the commission, while incumbent Theresa Kelly won the third seat with 1,164 votes, putting her two votes ahead of Albert Battaglia after provisional ballots were counted.

Michael Advena was sworn into office in November 2011 after winning a special election for the vacant seat that had been held by Stephen Weintrob.

Ventnor City is located in the 2nd Congressional District and is part of New Jersey's 2nd state legislative district.

For the 118th United States Congress, New Jersey's 2nd congressional district is represented by Jeff Van Drew (R, Dennis Township). New Jersey is represented in the United States Senate by Democrats Cory Booker (Newark, term ends 2027) and Andy Kim (Moorestown, term ends 2031).

For the 2024-2025 session, the 2nd legislative district of the New Jersey Legislature is represented in the New Jersey Senate by Vincent J. Polistina (R, Egg Harbor Township) and in the General Assembly by Don Guardian (R, Atlantic City) and Claire Swift (R, Margate City).

Atlantic County is governed by a directly elected county executive and a nine-member Board of County Commissioners, responsible for legislation. The executive serves a four-year term and the commissioners are elected to staggered three-year terms, of which four are elected from the county on an at-large basis and five of the commissioners represent equally populated districts. As of 2025, Atlantic County's Executive is Dennis Levinson (R, Northfield), whose term of office ends December 31, 2027. Members of the Board of County Commissioners are:

Ernest D. Coursey (D, District 1-- Atlantic City, Egg Harbor Township (part), Longport, Margate City, and Ventnor City; 2025, Atlantic City), Chair Maureen Kern (R, District 2-- Egg Harbor Township (part), Linwood, Northfield, Somers Point and Pleasantville; 2027, Somers Point), Andrew Parker III (R, District 3-- Egg Harbor Township (part) and Hamilton Township (part); 2026, Egg Harbor Township), Richard R. Dase (R, District 4, including Brigantine, Galloway Township, Egg Harbor Township (part), and Port Republic; 2025, Galloway Township), Vice Chair James A. Bertino (R, District 5-- Buena, Buena Vista Township, Corbin City, Egg Harbor City, Estell Manor, Folsom, Hamilton Township (part), Hammonton, Mullica Township and Weymouth Township; 2027, Hammonton), June Byrnes (R, At-Large; 2026, Linwood), Michael Ruffu (R, At-Large; Margate, 2027) Amy L. Gatto (R, At-large; 2025, Hamilton Township) and John W. Risley (R, At-Large; 2026, Egg Harbor Township)

Atlantic County's constitutional officers are: Clerk Joesph J. Giralo (R, 2026, Hammonton), Sheriff Joe O'Donoghue (R, 2026, Egg Harbor Township) and Surrogate James Curcio (R, 2025, Hammonton).

As of March 2011, there were a total of 6,293 registered voters in Ventnor City, of which 1,636 (26.0% vs. 30.5% countywide) were registered as Democrats, 2,012 (32.0% vs. 25.2%) were registered as Republicans and 2,644 (42.0% vs. 44.3%) were registered as Unaffiliated. There was one voter registered to another party. Among the city's 2010 Census population, 59.1% (vs. 58.8% in Atlantic County) were registered to vote, including 72.5% of those ages 18 and over (vs. 76.6% countywide).

In the 2012 presidential election, Democrat Barack Obama received 2,170 votes (51.8% vs. 57.9% countywide), ahead of Republican Mitt Romney with 1,965 votes (46.9% vs. 41.1%) and other candidates with 30 votes (0.7% vs. 0.9%), among the 4,192 ballots cast by the city's 6,861 registered voters, for a turnout of 61.1% (vs. 65.8% in Atlantic County). In the 2008 presidential election, Democrat Barack Obama received 2,372 votes (50.3% vs. 56.5% countywide), ahead of Republican John McCain with 2,257 votes (47.8% vs. 41.6%) and other candidates with 50 votes (1.1% vs. 1.1%), among the 4,718 ballots cast by the city's 7,009 registered voters, for a turnout of 67.3% (vs. 68.1% in Atlantic County). In the 2004 presidential election, Democrat John Kerry received 2,493 votes (52.1% vs. 52.0% countywide), ahead of Republican George W. Bush with 2,205 votes (46.1% vs. 46.2%) and other candidates with 32 votes (0.7% vs. 0.8%), among the 4,783 ballots cast by the city's 6,726 registered voters, for a turnout of 71.1% (vs. 69.8% in the whole county).

In the 2013 gubernatorial election, Republican Chris Christie received 1,806 votes (66.9% vs. 60.0% countywide), ahead of Democrat Barbara Buono with 775 votes (28.7% vs. 34.9%) and other candidates with 40 votes (1.5% vs. 1.3%), among the 2,699 ballots cast by the city's 6,897 registered voters, yielding a 39.1% turnout (vs. 41.5% in the county). In the 2009 gubernatorial election, Republican Chris Christie received 1,548 votes (50.9% vs. 47.7% countywide), ahead of Democrat Jon Corzine with 1,290 votes (42.4% vs. 44.5%), Independent Chris Daggett with 132 votes (4.3% vs. 4.8%) and other candidates with 26 votes (0.9% vs. 1.2%), among the 3,043 ballots cast by the city's 6,549 registered voters, yielding a 46.5% turnout (vs. 44.9% in the county).

The Ventnor City School District serves public school students in pre-kindergarten through eighth grade. As of the 2018–19 school year, the district, comprised of two schools, had an enrollment of 684 students and 70.5 classroom teachers (on an FTE basis), for a student–teacher ratio of 9.7:1. The Ventnor City School District operates two schools for Pre-K–8 within the Ventnor Educational Community Complex. Schools in the district (with 2018–19 enrollment data from the National Center for Education Statistics) are Ventnor Elementary School with 376 students in grades Pre-K–5 and Ventnor Middle School with 286 students in grades 6–8.

Public school students in ninth through twelfth grades, along with those from Brigantine and Margate City, attend Atlantic City High School in neighboring Atlantic City, as part of a sending/receiving relationship with the Atlantic City School District that has existed since 1920. As of the 2018–19 school year, the high school had an enrollment of 1,796 students and 153.0 classroom teachers (on an FTE basis), for a student–teacher ratio of 11.7:1. The Ventnor district has considered options for an alternative high school sending relationship.

City public school students are also eligible to attend the Atlantic County Institute of Technology in the Mays Landing section of Hamilton Township or the Charter-Tech High School for the Performing Arts, located in Somers Point.

The Roman Catholic Diocese of Camden operated St. James School, a K–8 school, until 2008, when it merged with Blessed Sacrament School in Margate City into Holy Family Regional School (using the St. James site). By 2011 it had a loss of $172,000 and only had 92 students. The sponsoring churches of Holy Family were Holy Trinity Church in Ventnor and St. Gianna Beretta Church of Northfield. The diocese announced that it would close Holy Family at the end of the 2010–2011 school year, as its enrollment was insufficient to cover the deficit. The building was demolished in 2016.

As of May 2010, the city had a total of 36.45 miles (58.66 km) of roadways, of which 34.03 miles (54.77 km) were maintained by the municipality and 2.42 miles (3.89 km) by the county.

No Interstate, U.S., state or major county highway directly serves Ventnor City. The only numbered roads in Ventnor City are minor county routes, such as County Route 629.

Dorset Avenue Bridge is a double-leaf bascule drawbridge across the Intracoastal Waterway (ICW) Inside Thorofare. Its operation is federally regulated. The bridge serves as a link in County Route 629.

NJ Transit provides bus service in the city to Atlantic City on routes 504 (from Margate) and 505 (from Longport).

According to the Köppen climate classification system, Ventnor City has a humid subtropical climate (Cfa) with hot, moderately humid summers, cool winters and year-around precipitation. Cfa climates are characterized by all months having an average mean temperature above 32.0 °F (0.0 °C), at least four months with an average mean temperature at or above 50.0 °F (10.0 °C), at least one month with an average mean temperature at or above 71.6 °F (22.0 °C) and no significant precipitation difference between seasons. During the summer months in Ventnor City, a cooling afternoon sea breeze is present on most days, but episodes of extreme heat and humidity can occur with heat index values at or above 95.0 °F (35.0 °C). During the winter months, episodes of extreme cold and wind can occur with wind chill values below 0.0 °F (−17.8 °C). The plant hardiness zone at Ventnor City Beach is 7b with an average annual extreme minimum air temperature of 8.0 °C (46.4 °F). The average seasonal (November–April) snowfall total is 12 to 18 inches (30 to 46 cm), and the average snowiest month is February which corresponds with the annual peak in nor'easter activity.

According to the A. W. Kuchler U.S. potential natural vegetation types, Ventnor City would have a dominant vegetation type of Northern Cordgrass (73) with a dominant vegetation form of Coastal Prairie (20).

People who were born in, residents of, or otherwise closely associated with Ventnor City include:

Wikimedia Commons has media related to Ventnor City, New Jersey.

Wikivoyage has a travel guide for Ventnor City, New Jersey.

• Ventnor City Website
• Ventnor Educational Community Complex
• School Performance Reports for the Ventnor City School District, New Jersey Department of Education
• School Data for the Ventnor City School District, National Center for Education Statistics
• The Downbeach Current