San Castle, Florida

As of the 2020 census, San Castle had a population of 3,755. The median age was 35.6 years. 26.3% of residents were under the age of 18 and 14.4% were 65 years of age or older. For every 100 females there were 98.9 males, and for every 100 females age 18 and over there were 99.6 males age 18 and over.^[9][10]

100.0% of residents lived in urban areas, while 0.0% lived in rural areas.^[11]

There were 1,179 households in San Castle, of which 37.5% had children under the age of 18 living in them. Of all households, 40.3% were married-couple households, 22.4% were households with a male householder and no spouse or partner present, and 30.0% were households with a female householder and no spouse or partner present. About 25.1% of all households were made up of individuals and 10.7% had someone living alone who was 65 years of age or older.^[9]

There were 1,281 housing units, of which 8.0% were vacant. The homeowner vacancy rate was 1.7% and the rental vacancy rate was 4.1%.^[9]

As of the 2010 United States census, there were 3,428 people, 880 households, and 672 families residing in the CDP.^[13]

In the 2020 American Community Survey 5-year estimates, there were 797 families residing in the CDP.^[14]

In 2015, the median household income of the 1,078 households in San Castle, FL grew to $49,107 from the previous year's value of $42,869.^[15]

In 2016, the most common first languages spoken in San Castle are English at 50.4%, Haitian (French) Creole at 31%, Spanish at 18.3%, and Chinese at 0.3%. And as of 2016, US citizens accounted for 77.7% of the population.

Prior to modern settlement, the high ground of the Atlantic Coastal Ridge was part of the greater Jaega tribe territory. The area lies just north of the historic Boynton Mound complex, a significant indigenous site that was largely destroyed in the early 20th century to provide shell fill for construction and development of Ocean Ridge.

Following World War II, the area was developed to meet the growing demand for housing in South Florida as well as for mango plantations. Platted primarily in the late 1950s, the community was designed as a residential subdivision featuring single-story homes consistent with the Florida Ranch architecture popular during that era.

Over the decades, the community evolved into a distinct census-designated place (CDP) separate from the neighboring municipalities of Lantana and Hypoluxo. Beginning in the 1980s and continuing through the 1990s, San Castle developed a diverse demographic identity, becoming a hub for Caribbean-American culture within Palm Beach County.

Despite its small size, the CDP has been notable for being home to the San Castle Soldiers, a set of the greater Top 6 gang; who was featured on the show Gangland, on the History Channel. The gang is notorious for being involved in the Christmas Eve shooting at the Boynton Beach Mall, which resulted in a death.^[16] The gang was also involved in several other homicides.^[17]