2010
The 2010 United States census reported that Fremont had a population of 214,089. The population density was 2,443.7 inhabitants per square mile (943.5/km2).
The Census reported that 212,438 people (99.2% of the population) lived in households, 969 (0.5%) lived in non-institutionalized group quarters, and 682 (0.3%) were institutionalized.
There were 71,004 households, out of which 31,070 (43.8%) had children under the age of 18 living in them, 45,121 (63.5%) were opposite-sex married couples living together, 7,070 (10.0%) had a female householder with no husband present, 3,382 (4.8%) had a male householder with no wife present. There were 2,779 (3.9%) unmarried opposite-sex partnerships, and 444 (0.6%) same-sex married couples or partnerships. 11,576 households (16.3%) were made up of individuals, and 3,697 (5.2%) had someone living alone who was 65 years of age or older. The average household size was 2.99. There were 55,573 families (78.3% of all households); the average family size was 3.36.
The population was spread out, with 53,216 people (24.9%) under the age of 18, 15,610 people (7.3%) aged 18 to 24, 66,944 people (31.3%) aged 25 to 44, 56,510 people (26.4%) aged 45 to 64, and 21,809 people (10.2%) who were 65 years of age or older. The median age was 36.8 years. For every 100 females, there were 98.9 males. For every 100 females age 18 and over, there were 96.4 males.
There were 73,989 housing units at an average density of 844.5 units per square mile (326.1 units/km2), of which 71,004 were occupied, of which 44,463 (62.6%) were owner-occupied, and 26,541 (37.4%) were occupied by renters. The homeowner vacancy rate was 1.3%; the rental vacancy rate was 4.5%. 136,606 people (63.8% of the population) lived in owner-occupied housing units and 75,832 people (35.4%) lived in rental housing units.
Fremont has a large Deaf community, in large part because it is home of the Northern California campus of the California School for the Deaf. The school district is called the Fremont Unified School District which also serves parts of Union City and Hayward.