Farmingdale is a borough in Monmouth County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 1,329, reflecting a decline of 258 (-16.3%) from the 1,587 counted in the 2000 Census, which had in turn increased by 125 (+8.5%) from the 1,462 counted in the 1990 Census.
Farmingdale was incorporated as a borough by an act of the New Jersey Legislature on April 8, 1903, from portions of Howell Township. The borough is named for its location at the center of an agricultural area.
According to the United States Census Bureau, the borough had a total area of 0.523 square miles (1.354 km2), including 0.522 square miles (1.351 km2) of land and 0.001 square miles (0.002 km2) of water (0.18%).
The borough is completely surrounded by Howell Township, making it part of 21 pairs of "doughnut towns" in the state, where one municipality entirely surrounds another.
The 2010 United States Census counted 1,329 people, 547 households, and 341.875 families in the borough. The population density was 2,547.7 per square mile (983.7/km2). There were 578 housing units at an average density of 1,108.0 per square mile (427.8/km2). The racial makeup was 89.62% (1,191) White, 2.86% (38) Black or African American, 0.45% (6) Native American, 3.16% (42) Asian, 0.00% (0) Pacific Islander, 1.73% (23) from other races, and 2.18% (29) from two or more races. Hispanic or Latino of any race were 6.92% (92) of the population.
Of the 547 households, 28.9% had children under the age of 18; 45.2% were married couples living together; 12.1% had a female householder with no husband present and 37.5% were non-families. Of all households, 28.2% were made up of individuals and 6.8% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 3.05.
21.5% of the population were under the age of 18, 8.2% from 18 to 24, 28.3% from 25 to 44, 31.6% from 45 to 64, and 10.4% who were 65 years of age or older. The median age was 39.8 years.