Cities in San Mateo County, California by Population (2024)

There are 35 cities in San Mateo County, California.

Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
San Mateo1California99,884105,656-1.42%8,23212.13
Daly City2California98,158104,858-1.68%12,8517.64
Mountain View3California81,45882,766-0.4%6,81211.96
Redwood City4California80,03283,887-1.19%4,13919.34
Palo Alto5California65,05768,357-1.25%2,70524.05
South San Francisco6California62,19665,902-1.47%6,7579.20
San Bruno7California40,52043,746-1.95%7,3825.49
Pacifica8California35,73038,514-1.91%2,84012.58
Foster City9California31,66233,733-1.61%8,3613.79
Menlo Park10California31,02333,690-2.1%3,1059.99
Burlingame11California29,45431,278-1.52%6,7054.39
San Carlos12California28,27030,638-2.05%5,2245.41
East Palo Alto13California27,63829,948-2.05%10,9332.53
Belmont14California26,07628,258-2.05%5,6324.63
Millbrae15California21,73623,138-1.59%6,6493.27
North Fair Oaks16California12,44414,992-4.87%10,4051.20
Half Moon Bay17California10,88311,771-2%1,7446.24
Hillsborough18California10,72311,363-1.47%1,7396.17
Atherton19California6,7077,171-1.7%1,3375.02
El Granada20California5,2696,069-3.5%1,0734.91
Woodside21California4,9525,291-1.69%43211.47
Brisbane22California4,4894,840-1.92%1,5042.98
Broadmoor23California4,2834,140-1.56%9,9140.43
Emerald Lake Hills24California4,1854,893-2.79%3,5411.18
Portola Valley25California4,1234,447-1.93%4549.08
West Menlo Park26California3,2193,720-2.75%6,6370.48
Moss Beach27California3,0413,436-2%1,3592.24
Highlands28California2,5442,985-3.53%1,9571.30
Montara29California2,4652,833-3.6%6363.88
Baywood Park30California1,7071,7860.59%3,1210.55
La Honda31California1,6151,2296.39%3794.26
Ladera32California1,4691,3851.45%3,4160.43
Colma33California1,3761,498-2.2%7281.89
Pescadero34California323418-3.87%804.03
Loma Mar35California02820%01.73
showing: 35 rows

Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.

What is the largest city in San Mateo County, California?

San Mateo is the largest city in San Mateo County.

What is the smallest city in San Mateo County, California?

Loma Mar is the smallest city in San Mateo County.

How many cities are in San Mateo County?

There are 35 cities in San Mateo County, California.

Frequently Asked Questions