2020 census As of the
2020 census, Cowan had a population of 342. The population density was . The median age was 34.0years. The age distribution was 108 people (31.6%) under the age of 18, 26 people (7.6%) aged 18 to 24, 94 people (27.5%) aged 25 to 44, 82 people (24.0%) aged 45 to 64, and 32 people (9.4%) who were 65years of age or older. For every 100 females, there were 97.7 males, and for every 100 females age 18 and over there were 95.0 males age 18 and over. 100.0% of residents lived in urban areas, while 0.0% lived in rural areas. The whole population lived in households. There were 84 households, of which 38 (45.2%) had children under the age of 18 living in them. Of all households, 47 (56.0%) were married-couple households, 6 (7.1%) were
cohabiting couple households, 20 (23.8%) had a male householder with no partner present, and 11 (13.1%) had a female householder with no partner present. 18 households (21.4%) were one person, and 8 (9.5%) were one person aged 65 or older. The average household size was 4.07. There were 66
families (78.6% of all households). There were 97 housing units at an average density of , of which 84 (86.6%) were occupied. The homeowner vacancy rate was 0.0% and the rental vacancy rate was 10.5%. Of occupied units, 50 (59.5%) were owner-occupied, and 34 (40.5%) were occupied by renters. ==References==