Ocean County is a county located along the Jersey Shore in the south-central portion of the U.S. state of New Jersey. Its county seat is Toms River. Since 1990, Ocean County has been one of New Jersey's fastest-growing counties. As of the 2019 Census estimate, the county's population was 607,186, a 5.3% increase from the 576,567 enumerated in the 2010 United States Census, making Ocean the state's sixth-most populous county. The 2010 population figure represented an increase of 65,651 (+12.8%) from the 2000 Census population of 510,916, as Ocean surpassed Union County to become the sixth-most populous county in the state. Ocean County was also the fastest growing county in New Jersey between 2000 and 2010 in terms of increase in the number of residents and second-highest in percentage growth. Ocean County was established on February 15, 1850, from portions of Monmouth County, with the addition of Little Egg Harbor Township which was annexed from Burlington County on March 30, 1891. The most populous place is Lakewood Township, with an estimated 102,682 residents as of 2017, up 10.6% from 92,843 at the 2010 Census (in turn an increase of 32,491 since 2000, the highest of any New Jersey municipality); while Jackson Township covers 100.62 square miles (260.6 km2), the largest total area of any municipality in the county.Ocean County is located 50 miles (80 km) east of Philadelphia, 70 miles (110 km) south of New York City, and 25 miles (40 km) north of Atlantic City, making it a prime destination for residents of these cities during the summer. As with the entire Jersey Shore, summer traffic routinely clogs local roadways throughout the season. Ocean County is part of the New York metropolitan area but is also home to many tourist attractions frequently visited by Delaware Valley residents, especially the beachfront communities of Seaside Heights, Long Beach Island, Point Pleasant Beach, as well as Six Flags Great Adventure, which is the home of the world's tallest and second-fastest roller coaster, Kingda Ka. Ocean County is also a gateway to New Jersey's Pine Barrens, one of the largest protected pieces of land on the East Coast. Ocean County is part of both New York City's and Philadelphia's media markets.

Seaside Heights is a borough in Ocean County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 2,887, reflecting a decline of 268 (-8.5%) from the 3,155 counted in the 2000 Census, which had in turn increased by 789 (+33.3%) from the 2,366 counted in the 1990 Census. Seaside Heights is situated on the Barnegat Peninsula, a long, narrow barrier peninsula that separates Barnegat Bay from the Atlantic Ocean. During the summer, the borough attracts a crowd largely under the age of 21, drawn to a community with boardwalk entertainment and one of the few shore communities with sizable numbers of apartments, attracting as many as 65,000 people who are often out until early morning visiting bars and restaurants.Seaside Heights was incorporated as a borough by an act of the New Jersey Legislature on February 26, 1913, from portions of both Berkeley Township and Dover Township (now Toms River Township), based on the results of a referendum held on March 25, 1913. The borough was named for its location on the Atlantic Ocean.As a resort community, the beach, an amusement-oriented boardwalk, and numerous clubs and bars, make it a popular destination. Seaside Heights calls itself, "Your Home For Family Fun Since 1913!" The beach season runs from March to October, with the peak months being July and August, when the summer population explodes to 30,000 to 65,000. Route 37 in Toms River is routinely gridlocked on Friday afternoons in the summer months as vacationers travel to the barrier islands. The community is also known as the location of the hit MTV show Jersey Shore, with the director of the borough's business improvement district saying in 2010 that "we can't even calculate the economic benefit" to Seaside Heights from the continued presence of the show.

Monmouth County () is a county located on the coast of New Jersey, in the United States within the New York metropolitan area, and the northernmost county along the Jersey Shore. As of the 2020 Census estimate, the county's population was 618,381, making it the state's fifth-most populous county, representing a decrease of 0.6% from the 2010 Census, when the population was enumerated at 630,380, in turn an increase of 15,079 from 615,301 at the 2000 Census. As of 2010, the county fell to the fifth-most populous county in the state, having been surpassed by Hudson County.Its county seat is Freehold Borough. The most populous place was Middletown Township, with 66,522 residents at the time of the 2010 Census, while Howell Township covered 61.21 square miles (158.5 km2), the largest total area of any municipality.

Trenton is the capital city of the U.S. state of New Jersey and the county seat of Mercer County. It briefly served as the capital of the United States in 1784. The city's metropolitan area, consisting of Mercer County, is grouped with the New York Combined Statistical Area by the United States Census Bureau, but it directly borders the Philadelphia metropolitan area and was from 1990 until 2000 part of the Philadelphia Combined Statistical Area. As of the 2010 United States Census, Trenton had a population of 84,913, making it the state's 10th-largest municipality after having been the state's ninth-largest municipality in 2000. The population declined by 490 (-0.6%) from the 85,403 counted in the 2000 Census, which had in turn declined by 3,272 (-3.7%) from the 88,675 counted in the 1990 Census. The Census Bureau's Population Estimates Program calculated that the city's population was 83,203 in 2019, ranking the city the 413th-most-populous in the country.Trenton dates back at least to June 3, 1719, when mention was made of a constable being appointed for Trenton while the area was still part of Hunterdon County. Boundaries were recorded for Trenton Township as of March 2, 1720. A courthouse and jail were constructed in Trenton around 1720, and the Freeholders of Hunterdon County met annually in Trenton. Trenton became New Jersey's capital as of November 25, 1790, and the City of Trenton was formed within Trenton Township on November 13, 1792. Trenton Township was incorporated as one of New Jersey's initial group of 104 townships by an act of the New Jersey Legislature on February 21, 1798. On February 22, 1834, portions of Trenton Township were taken to form Ewing Township. The remaining portion of Trenton Township was absorbed by the City of Trenton on April 10, 1837. A series of annexations took place over a 50-year period, with the city absorbing South Trenton borough (April 14, 1851), portions of Nottingham Township (April 14, 1856), both the Borough of Chambersburg Township, and Millham Township (both on March 30, 1888), as well as Wilbur Borough (February 28, 1898). Portions of Ewing Township and Hamilton Township were annexed to Trenton on March 23, 1900.