Contra Costa County, California Cities (2025)

52 cities

City
Rank
2025 Pop.
2020 Pop.
Annual Change
Density
Area (mi²)
Type
Concord1120,334125,286-0.82%3,93731 City
Antioch2118,240115,3790.49%4,05329 City
Richmond3112,712116,196-0.61%3,75230 City
San Ramon483,96386,377-0.57%4,18620 City
Pittsburg575,43576,354-0.24%4,26818 City
Walnut Creek668,45670,196-0.51%3,46420 City
Brentwood765,57464,4530.34%4,41115 City
Oakley847,28143,4801.63%2,98016 City
Danville942,62543,560-0.44%2,35818 Town
Martinez1035,86137,195-0.74%2,83613 City
Pleasant Hill1133,26734,604-0.8%4,7027 City
San Pablo1230,68932,089-0.9%11,6963 City
Hercules1326,89226,1170.58%4,1936 City
El Cerrito1425,29225,941-0.51%6,8884 City
Bay Point1525,17125,3781.02%3,9176 CDP
Lafayette1624,81825,392-0.46%1,65215 City
Orinda1719,26419,514-0.26%1,49913 City
Pinole1818,13119,005-0.96%3,5525 City
Moraga1916,32516,880-0.68%1,7269 Town
El Sobrante2016,20414,7791.48%5,2343 CDP
Discovery Bay2115,86415,9041.06%2,8376 CDP
Alamo2214,30113,864-0.13%1,45710 CDP
El Sobrante2311,97813,096-0.42%1,6567 CDP
Blackhawk2410,93910,5900.98%1,8946 CDP
Clayton2510,55111,058-0.95%2,7484 City
Rodeo269,49810,0230.58%2,5354 CDP
Contra Costa Centre278,6056,6677.15%13,5091 CDP
Camino Tassajara287,2485,8704.86%5,6801 CDP
Saranap296,3696,0271.22%5,6111 CDP
El Cerrito305,3855,2690.35%2,0703 CDP
Pacheco315,3804,7752.15%7,1641 CDP
Tara Hills325,2214,9150.12%7,8281 CDP
North Richmond333,7384,2580.03%2,6891 CDP
Crockett343,6943,2051.09%3,4781 CDP
Rollingwood353,6123,6121.2%20,8790 CDP
East Richmond Heights363,2863,4730%5,6661 CDP
Reliez Valley373,2123,3210.22%1,3612 CDP
Vine Hill383,0813,228-1.44%2,0512 CDP
Bayview392,7232,7542.45%8,9280 CDP
Byron402,0782,0572.62%3197 CDP
Montalvin Manor412,0252,490-2.74%6,3080 CDP
Bethel Island421,9572,015-0.61%3735 CDP
Knightsen431,6661,1000.42%1998 CDP
Shell Ridge441,0611,0810.57%2,4670 CDP
North Gate459557401.92%1,2991 CDP
Norris Canyon46953790-0.1%2644 CDP
Castle Hill479381,164-2.49%1,6031 CDP
Acalanes Ridge48917875-1.61%1,9890 CDP
Alhambra Valley499151,051-0.11%5672 CDP
Clyde507327370.55%5,1910 CDP
Diablo51676834-4.52%4961 CDP
Port Costa522662421.92%1,6840 CDP

Contra Costa County Cities Summary

Largest City

Concord is the largest city in Contra Costa County, with a population of 120,334.

Smallest City

Port Costa is the smallest city in Contra Costa County, with a population of 266.

10 Largest Cities

There are 52 cities in Contra Costa County, California.

Location of Contra Costa County