2020 census As of the
2020 census, Martinez had a population of 37,287. The median age was 42.9 years. 19.3% of residents were under the age of 18 and 18.3% of residents were 65 years of age or older. For every 100 females there were 95.1 males, and for every 100 females age 18 and over there were 92.8 males age 18 and over. There were 14,851 households in Martinez, of which 28.5% had children under the age of 18 living in them. Of all households, 49.3% were married-couple households, 15.8% were households with a male householder and no spouse or partner present, and 27.9% were households with a female householder and no spouse or partner present. About 27.3% of all households were made up of individuals and 12.0% had someone living alone who was 65 years of age or older.
2010 census The
2010 United States Census reported that Martinez had a population of 35,824. The
population density was 2,727.4 people per square mile (1,053.1/km²). The racial makeup of Martinez was 27,603 (77.1%)
White, 1,303 (3.6%)
African American, 255 (0.7%)
Native American, 2,876 (8.0%)
Asian, 121 (0.3%)
Pacific Islander, 1,425 (4.0%) from
other races, and 2,241 (6.3%) from two or more races.
Hispanic or
Latino of any race were 5,258 persons (14.7 percent). The Census reported that 34,528 people (96.4 percent of the population) lived in households, 235 (0.7 percent) lived in non-institutionalized group quarters, and 1,061 (3.0 percent) were institutionalized. There were 14,287 households, out of which 4,273 (29.9 percent) had children under the age of 18 living in them, 6,782 (47.5 percent) were opposite-sex married couples living together, 1,751 (12.3 percent) had a female householder with no husband present, 640 (4.5 percent) had a male householder with no wife present. There were 928 (6.5 percent) unmarried opposite-sex partnerships, and 137 (1.0 percent) same-sex married couples or partnerships. 3,920 households (27.4 percent) were made up of individuals and 1,078 (7.5 percent) had someone living alone who was 65 years of age or older. The average household size was 2.42. There were 9,173
families (64.2 percent of all households); the average family size was 2.95. The age distribution of the population showed 7,329 people (20.5 percent) under the age of 18, 2,842 people (7.9 percent) aged 18 to 24, 9,193 people (25.7 percent) aged 25 to 44, 12,121 people (33.8 percent) aged 45 to 64, and 4,339 people (12.1 percent) who were 65 years of age or older. The median age was 42.2 years. For every 100 females, there were 96.9 males. For every 100 females age 18 and over, there were 94.8 males. There were 14,976 housing units at an average density of 1,140.2 per square mile (440.2/km²), of which 14,287 were occupied, of which 9,619 (67.3 percent) were owner-occupied, and 4,668 (32.7 percent) were occupied by renters. The homeowner vacancy rate was 1.4 percent; the rental vacancy rate was 4.9 percent. 23,876 people (66.6 percent of the population) lived in owner-occupied housing units and 10,652 people (29.7 percent) lived in rental housing units.
2000 census As of the census of 2000, there were 35,866 people, 14,300 households, and 9,209 families residing in the city. The
population density was 2,927.6 people per square mile (1,130.4/km²). There were 14,597 housing units at an average density of 1,191.5/sq mi (460.1/km²). The racial makeup of the city was 81.03 percent
White, 3.35 percent
Black or
African American, 0.74 percent
Native American, 6.63 percent
Asian, 0.23 percent
Pacific Islander, 3.29 percent from
other races, and 4.72 percent from two or more races. 10.20 percent of the population were
Hispanic or
Latino of any race. 11.7 percent claimed to be of German, 10.8 percent Irish, 10.2 percent Italian, 9.4 percent English and 5.4 percent American ancestry. There were 14,300 households out of which 30.0 percent had children under the age of 18 living with them, 49.4 percent were married couples living together, 11.0 percent had a female householder with no husband present, and 35.6 percent were non-families. 27.4 percent of all households were made up of individuals and 6.9 percent had someone living alone who was 65 years of age or older. The average household size was 2.41 and the average family size was 2.96. In the city, the age distribution of the population showed 22.7 percent under the age of 18, 7.3 percent from 18 to 24, 32.6 percent from 25 to 44, 27.3 percent from 45 to 64, and 10.1 percent who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 98.5 males. For every 100 females age 18 and over, there were 96.0 males. The median income for a household in the city was $63,010, and the median income for a family was $77,411 (these figures had risen to $73,668 and $92,486 respectively as of a 2007 estimate). Males had a median income of $52,135 versus $40,714 for females. The per capita income for the city was $29,701. About 3.2 percent of families and 5.2 percent of the population were below the
poverty line, including 3.9 percent of those under age 18 and 4.8 percent of those age 65 or over. The languages spoken were 88 percent English, 6 percent Spanish, 2 percent Tagalog, 1 percent German, 1 percent Chinese, 0.5 percent Italian, 0.5 percent Persian, 0.3 percent Korean, 0.3 percent Portuguese, 0.3 percent Russian, 0.3 percent Arabic, 0.2 percent Dutch, 0.2 percent Polish, 0.2 percent French, 0.2 percent Punjabi, 0.2 percent Vietnamese, 0.1 percent Japanese, 0.1 percent Tamil, 0.1 percent Cantonese. Of the 4,176 people who did not use English as their primary language 3,663 (87.7 percent) spoke it well or very well while 513 (12.3 percent) spoke it "not well" or "not at all" ==Economy==