La Presa is located at . According to the United States Census Bureau, the CDP has a total area of. of it is land and of it is water.
Demographics
2010
At the 2010 census La Presa had a population of 34,169. The population density was 5,678.3 people per square mile. The racial makeup of La Presa was 9,045 White, 4,428 African American, 282 Native American, 3,958 Asian, 410 Pacific Islander, 8,238 from other races, and 2,535 from two or more races. Hispanic or Latino of any race were 19,279 persons. The census reported that 33,924 people lived in households, 154 lived in non-institutionalized group quarters, and 91 were institutionalized. There were 10,178 households, 4,708 had children under the age of 18 living in them, 5,270 were opposite-sex married couplesliving together, 1,885 had a female householder with no husband present, 784 had a male householder with no wife present. There were 640 unmarried opposite-sex partnerships, and 85 same-sex married couples or partnerships. 1,625 households were one person and 705 had someone living alone who was 65 or older. The average household size was 3.33. There were 7,939 families ; the average family size was 3.69. The age distribution was 9,584 people under the age of 18, 3,692 people aged 18 to 24, 9,287 people aged 25 to 44, 8,015 people aged 45 to 64, and 3,591 people who were 65 or older. The median age was 32.7 years. For every 100 females, there were 95.9 males. For every 100 females age 18 and over, there were 92.1 males. There were 10,711 housing units at an average density of 1,780.0 per square mile, of the occupied units 6,338 were owner-occupied and 3,840 were rented. The homeowner vacancy rate was 2.2%; the rental vacancy rate was 5.7%. 20,565 people lived in owner-occupied housing units and 13,359 people lived in rental housing units.
2000
At the 2000 census there were 32,721 people, 10,008 households, and 7,986 families in the CDP. The population density was 5,843.6 inhabitants per square mile. There were 10,236 housing units at an average density of 1,828.0 per square mile. The racial makeup of the CDP was 25.6% White, 14.5% African American, 0.9% Native American, 9.8% Asian, 1.1% Pacific Islander, 16.4% from other races, and 7.1% from two or more races. Hispanic or Latino of any race were 51.1%. Of the 10,008 households 43.5% had children under the age of 18 living with them, 57.6% were married couples living together, 16.5% had a female householder with no husband present, and 20.2% were non-families. 14.6% of households were one person and 5.8% were one person aged 65 or older. The average household size was 3.25 and the average family size was 3.55. The age distribution was 31.3% under the age of 18, 9.3% from 18 to 24, 30.5% from 25 to 44, 19.6% from 45 to 64, and 9.3% 65 or older. The median age was 32 years. For every 100 females, there were 95.2 males. For every 100 females age 18 and over, there were 91.3 males. The median household income was $45,939 and the median family income was $47,486. Males had a median income of $34,412 versus $26,210 for females. The per capita income for the CDP was $15,998. About 9.4% of families and 10.7% of the population were below the poverty line, including 15.5% of those under age 18 and 6.4% of those age 65 or over.
