2020 census As of the
2020 census, Lathrop had a population of 28,701 and a population density of . The median age was 34.0 years. The age distribution was 28.8% under the age of 18, 9.4% aged 18 to 24, 28.4% aged 25 to 44, 23.5% aged 45 to 64, and 9.7% who were 65 years of age or older. For every 100 females, there were 97.8 males, and for every 100 females age 18 and over, there were 96.3 males age 18 and over. The census reported that 99.9% of the population lived in households, 0.1% lived in non-institutionalized group quarters, and no one was institutionalized. In addition, 99.0% of residents lived in urban areas, while 1.0% lived in rural areas. There were 7,571 households, of which 54.9% had children under the age of 18 living in them. Of all households, 61.6% were married-couple households, 6.5% were
cohabiting couple households, 17.6% were households with a female householder and no spouse or partner present, and 14.3% were households with a male householder and no spouse or partner present. About 8.9% of all households were made up of individuals, and 3.0% had someone living alone who was 65 years of age or older. The average household size was 3.79. There were 6,599
families (87.2% of all households). There were 7,802 housing units at an average density of , of which 7,571 (97.0%) were occupied and 3.0% were vacant. Of occupied units, 80.2% were owner-occupied and 19.8% were occupied by renters. The homeowner vacancy rate was 1.1%, and the rental vacancy rate was 2.5%.
2010 census The
2010 United States census reported that Lathrop had a population of 18,023. The population density was . The
racial makeup of Lathrop was 7,410 (41.1%) White, 1,300 (7.2%) African American, 231 (1.3%) Native American, 3,968 (22.0%) Asian (mostly Filipino), 144 (0.8%) Pacific Islander, 3,735 (20.7%) from
other races, and 1,235 (6.9%) from two or more races. Hispanics or Latinos of any race were 7,674 persons (42.6%). The census reported that 18,011 people (99.9% of the population) lived in households, 6 (<0.1%) lived in noninstitutionalized group quarters, and 6 (<0.1%) were institutionalized. Of the 4,782 households, 2,738 (57.3%) had children under 18 living in them, 2,973 (62.2%) were opposite-sex married couples living together, 719 (15.0%) had a female householder with no husband present, 379 (7.9%) had a male householder with no wife present; 376 (7.9%) were
unmarried opposite-sex partnerships, and 35 (0.7%)
same-sex married couples or partnerships. About 10.1% of households were made up of individuals, and 2.7% had someone living alone who was 65 or older. The average household size was 3.77. The average family size was 3.99. The age distribution was 5,819 people (32.3%) under 18, 1,814 people (10.1%) 18 to 24, 5,324 people (29.5%) 25 to 44, 3,897 people (21.6%) 45 to 64, and 1,169 people (6.5%) who were 65 or older. The median age was 30.5 years. For every 100 females, there were 99.7 males. For every 100 females 18 and over, there were 97.7 males. The 5,261 housing units had an average density of , of which 3,604 (75.4%) were owner-occupied, and 1,178 (24.6%) were occupied by renters. The homeowner vacancy rate was 3.7%; the rental vacancy rate was 5.5%, and 13,191 people (73.2% of the population) lived in owner-occupied housing units with 4,820 people (26.7%) in rental housing units. ==Economy==