Calwa first appeared as a
census designated place in the
2010 U.S. census. and as a CDP in the
1980 United States census (pop. 6,640) which was annexed by the city of
Fresno prior to the
1990 U.S. census.
Racial and ethnic composition 2020 census As of the
2020 census, Calwa had a population of 1,776. The population density was . The census reported that 1,768 people (99.5% of the population) lived in households, 8 (0.5%) lived in non-institutionalized group quarters, and no one was institutionalized. 100.0% of residents lived in urban areas, while 0.0% lived in rural areas. There were 448 households, out of which 217 (48.4%) had children under the age of 18 living in them. Of all households, 188 (42.0%) were married-couple households, 50 (11.2%) were
cohabiting couple households, 117 (26.1%) had a female householder with no spouse or partner present, and 93 (20.8%) had a male householder with no spouse or partner present. About 65 households (14.5%) were made up of individuals, and 20 (4.5%) had someone living alone who was 65 years of age or older. The average household size was 3.95, and there were 352
families (78.6% of all households). The age distribution was 551 people (31.0%) under the age of 18, 226 people (12.7%) aged 18 to 24, 523 people (29.4%) aged 25 to 44, 333 people (18.8%) aged 45 to 64, and 143 people (8.1%) who were 65years of age or older. The median age was 29.0years. For every 100 females, there were 108.9 males, and for every 100 females age 18 and over, there were 105.5 males age 18 and over. There were 474 housing units at an average density of , of which 448 (94.5%) were occupied and 26 (5.5%) were vacant. Of the occupied units, 173 (38.6%) were owner-occupied and 275 (61.4%) were occupied by renters. The homeowner vacancy rate was 1.7%, and the rental vacancy rate was 1.4%. ==Transportation==