Martinez, California

Martinez population, 2020 to 2024

Martinez lost 181 residents from July 2020 to July 2024, a change of -0.5%. In the latest year it moved by +294. Among 429 California places of 5,000 or more, that growth ranks 186th; the median place changed by -1.1%. The median place of 5,000+ in California has 37,056 people, so Martinez is 100% of it.

Martinez covers 12.64 square miles of land and 1.01 of water, for 2,928 people per square mile of land. The median California place of 5,000+ has 3,725, so Martinez is less dense than the typical town.

What county Martinez is in

All of Martinez's residents live in Contra Costa County, which had 1,172,607 residents in 2024. Martinez holds 3.2% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Martinez

1 ZIP Code Tabulation Area (ZCTA) overlaps Martinez by at least 10% of the ZCTA's or the city's land: 94553. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Martinez is

The Census internal point of Martinez is at 37.998100, -122.114400. Sacramento, the capital, is 52.3 miles NE in a straight line. The nearest larger place is Concord, CA (124,016 people), 6.4 miles away.

Daylight in Martinez

At 38.00° N, Martinez gets about 14 h 48 min of daylight around the June solstice and 9 h 32 min around the December solstice, a swing of 5 h 17 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Martinez

The eight nearest incorporated places of 1,000+ in California, measured between internal points. The closest is Pleasant Hill, 3.7 miles away, with 34,169 people.