Sea Girt is a borough in Monmouth County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 1,828, reflecting a decline of 320 (-14.9%) from the 2,148 counted in the 2000 Census, which had in turn increased by 49 (+2.3%) from the 2,099 counted in the 1990 Census.
Sea Girt was formed as a borough by an act of the New Jersey Legislature on March 29, 1917, from portions of Wall Township, based on the results of a referendum held on May 1, 1917. The borough was named for the estate of Comm. Robert F. Stockton, who had purchased a property in the area in 1853.
In the Forbes magazine 2012 rankings of "America's Most Expensive ZIP Codes", the borough was ranked 197th, with a median price of $1,135,184.
According to the United States Census Bureau, the borough had a total area of 1.450 square miles (3.756 km2), including 1.057 square miles (2.737 km2) of land and 0.393 square miles (1.018 km2) of water (27.11%).
Wreck Pond is a tidal pond located on the coast of the Atlantic Ocean, surrounded by Wall Township and the boroughs of Sea Girt, Spring Lake and Spring Lake Heights. The Wreck Pond watershed covers about 12.8 square miles (33 km2) in eastern Monmouth County.
The borough borders the Monmouth County municipalities of Manasquan, Spring Lake, Spring Lake Heights and Wall Township.
The 2010 United States Census counted 1,828 people, 823 households, and 545.649 families in the borough. The population density was 1,729.6 per square mile (667.8/km2). There were 1,291 housing units at an average density of 1,221.5 per square mile (471.6/km2). The racial makeup was 99.12% (1,812) White, 0.00% (0) Black or African American, 0.00% (0) Native American, 0.22% (4) Asian, 0.00% (0) Pacific Islander, 0.22% (4) from other races, and 0.44% (8) from two or more races. Hispanic or Latino of any race were 1.64% (30) of the population.
Of the 823 households, 20.7% had children under the age of 18; 58.1% were married couples living together; 6.7% had a female householder with no husband present and 33.7% were non-families. Of all households, 30.7% were made up of individuals and 18.6% had someone living alone who was 65 years of age or older.