Delft Colony is a census-designated place (CDP) in Tulare County, California. Delft Colony sits at an elevation of 312 feet (95 m). The 2010 United States census reported Delft Colony's population was 454.

According to the United States Census Bureau, the CDP covers an area of 0.07 square miles (0.17 km), all of it land.

Historical population

Census	Pop.	Note	%±
2010	454		—
2020	412		−9.3%
U.S. Decennial Census

At the 2010 census Delft Colony had a population of 454. The population density was 6,917.0 inhabitants per square mile (2,670.7/km). The racial makeup of Delft Colony was 213 (46.9%) White, 13 (2.9%) African American, 0 (0.0%) Native American, 0 (0.0%) Asian, 0 (0.0%) Pacific Islander, 224 (49.3%) from other races, and 4 (0.9%) from two or more races. Hispanic or Latino of any race were 428 people (94.3%).

The whole population lived in households, no one lived in non-institutionalized group quarters and no one was institutionalized.

There were 111 households, 64 (57.7%) had children under the age of 18 living in them, 67 (60.4%) were opposite-sex married couples living together, 19 (17.1%) had a female householder with no husband present, 11 (9.9%) had a male householder with no wife present. There were 9 (8.1%) unmarried opposite-sex partnerships, and 0 (0%) same-sex married couples or partnerships. 11 households (9.9%) were one person and 4 (3.6%) had someone living alone who was 65 or older. The average household size was 4.09. There were 97 families (87.4% of households); the average family size was 4.26.

The age distribution was 152 people (33.5%) under the age of 18, 65 people (14.3%) aged 18 to 24, 122 people (26.9%) aged 25 to 44, 81 people (17.8%) aged 45 to 64, and 34 people (7.5%) who were 65 or older. The median age was 26.0 years. For every 100 females, there were 111.2 males. For every 100 females age 18 and over, there were 112.7 males.

There were 124 housing units at an average density of 1,889.2 per square mile, of the occupied units 55 (49.5%) were owner-occupied and 56 (50.5%) were rented. The homeowner vacancy rate was 1.8%; the rental vacancy rate was 13.8%. 223 people (49.1% of the population) lived in owner-occupied housing units and 231 people (50.9%) lived in rental housing units.