Long Branch is a beachside city in Monmouth County, in the U.S. state of New Jersey. As of the 2020 United States census, the city's population was 31,667,^[10][11] an increase of 948 (+3.1%) from the 2010 census count of 30,719,^[20][21] which in turn reflected a decline of 621 (−2.0%) from the 31,340 counted in the 2000 census.^[22] As of the 2020 census, it was the 6th-most-populous municipality in Monmouth County and had the 74th-highest population of any municipality in New Jersey.^[11]

Long Branch was formed on April 11, 1867, as the Long Branch Commission, from portions of Ocean Township. Long Branch was incorporated as a city by an act of the New Jersey Legislature on April 8, 1903, based on the results of a referendum, replacing the Long Branch Commission.^[23]