HomeCaliforniaSan Mateo CountySouth San Francisco
South San Francisco, California: commercial real estate data.
South San Francisco is a Census city of 64,305 people across 9.20 square miles of land, in San Mateo County. Median household income is $136,578, 59.0 percent of occupied homes are owned, and the SBA record carries 75 7(a) approvals to borrowers here worth $51.4 m since FY2020.
Underlined figures are computed by MMCG Analytics, not published by the agency.
South San Francisco
What South San Francisco is
- Census place typecity
- Land area9.2 sq mi
- Water area20.97 sq mi
- Population per square mile of land6,987
- County holding the largest share of its areaSan Mateo County, 100.0 percent
US Census Bureau, cartographic boundary file, places, 2024 vintage. US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
South San Francisco
How many people live in South San Francisco
- Population64,305
- Median age43.2
- Population under 1811,075
- Share under 1817.2 percent
- Population 65 and over12,320
- Share 65 and over19.2 percent
- Households21,838
- Family households15,605
- Share of households that are families71.5 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
South San Francisco
Income and work in South San Francisco
- Median household income$136,578
- Per capita income$62,611
- Civilian labor force36,569
- Employed35,544
- Unemployed1,025 plus or minus 235
- Unemployment rate2.8 percent plus or minus 0.6
- Adults 25 and over48,451
- Adults 25 and over with a high school diploma or higher86.0 percent
- Adults 25 and over with a bachelor degree or higher40.8 percent
- Adults 25 and over with a graduate degree12.6 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
South San Francisco
Housing in South San Francisco
- Housing units23,515
- Occupied units21,838
- Vacant units1,677 plus or minus 360
- Vacancy rate7.1 percent plus or minus 1.5
- Owner occupied12,878
- Renter occupied8,960
- Ownership rate59.0 percent
- Median owner-occupied home value$1,188,800
- Median gross rent, monthly$2,802
- Annual rent as a share of median income24.6 percent
- Single family units16,018
- Share single family68.1 percent
- Units in buildings of two or more7,144
- Share in buildings of two or more30.4 percent
- Mobile homes273 plus or minus 164
- Median year structure built1965
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
South San Francisco
How South San Francisco gets to work
- Workers 16 and over who commute28,485
- Commuting under 15 minutes5,938
- Share commuting under 15 minutes20.8 percent
- Commuting 30 minutes or more10,618
- Share commuting 30 minutes or more37.3 percent
- Drove alone61.4 percent
- Carpooled11.4 percent
- Public transport5.5 percent plus or minus 1.4
- Walked1.9 percent plus or minus 0.6
- Worked from home17.4 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
South San Francisco
SBA loans in South San Francisco (7(a))
- Approvals75
- Gross approval$51,368,600
- Average approval$684,915
- Median approval$250,000
- Ninetieth percentile approval$1,751,400
- Largest approval$4,550,000
- Jobs supported681
- Jobs per approval9.1
- Loans with a final outcome14
- Paid in full13
- Charged off1
- Median term120 months
- Share on real estate terms of 20 years or more24.0 percent
- Share to franchises6.7 percent
- Distinct lenders28
- Distinct industries by NAICS58
Counted by borrower city: approvals to borrowers whose address is in South San Francisco, in any county, FY2020 to FY2026. Only 14 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 7(a) FOIA release, FY2020 to FY2026 year to date, as of 2026-06-30.
South San Francisco
SBA loans in South San Francisco (504)
- Approvals51
- Gross approval$75,219,000
- Average approval$1,474,882
- Median approval$1,009,000
- Largest approval$5,500,000
- Jobs supported806
- Loans with a final outcome23
- Charged off0
- Median term240 months
- Distinct CDCs8
Counted by borrower city: approvals to borrowers whose address is in South San Francisco, in any county, FY2010 to FY2026. Only 23 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 504 FOIA release, FY2010 to FY2026 year to date, as of 2026-06-30.
South San Francisco
Flood risk in South San Francisco
- NFIP communityCity of South San Francisco
- NFIP community number065062
- Participating in the NFIPYes
- Community Rating System classNone
- Currently effective map date04/05/19
The City of South San Francisco participates in the National Flood Insurance Program as community 065062 and carries no Community Rating System class, so no CRS premium discount applies to it.
Federal Emergency Management Agency, NFIP Community Status Book (OpenFEMA), as of 2026-09-26.
San Mateo County, not South San Francisco
San Mateo County context, not South San Francisco figures
- Establishments in San Mateo County21,569
- Covered employment, San Mateo County416,422
- Average annual pay, San Mateo County$196,441
- Housing units permitted, San Mateo County1,088
Every figure in this section is published for San Mateo County as a whole and is not a measurement of South San Francisco.
All San Mateo County figures →
US Census Bureau, County Business Patterns, 2023. US Bureau of Labor Statistics, Quarterly Census of Employment and Wages, 2024 annual averages. US Census Bureau, Building Permits Survey, 2024 annual.
Coverage
What this page does not hold.
Parcel detail, zoning and the flood zone at an address are not on this page; they resolve at the address in the platform. How this page was built →
Common questions
South San Francisco questions, answered from the record.
How many people live in South San Francisco, California?
64,305, in 21,838 households. South San Francisco city covers 9.20 square miles of land, which is 6,987 people per square mile. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
What county is South San Francisco in?
San Mateo County, which holds 100.0 percent of the place by area. Source: US Census Bureau, cartographic boundary file, places, 2024 vintage.
What is the median household income in South San Francisco?
$136,578. The median owner-occupied home is valued at $1,188,800. Median gross rent is $2,802 per month. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
How much SBA lending goes to South San Francisco businesses?
75 7(a) approvals totaling $51.4 m since FY2020, across 28 lenders, median approval $250,000, plus 51 504 approvals worth $75.2 m since FY2010. These count approvals to borrowers whose address is in South San Francisco, not projects sited inside the place boundary, and they are approvals recorded in the release rather than loans disbursed.
Do SBA loans to South San Francisco borrowers get paid back?
No rate is published for South San Francisco. Only 14 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published. The counts are shown instead.
Is South San Francisco in the National Flood Insurance Program?
Yes. South San Francisco appears in the FEMA Community Status Book as South San Francisco, city of, community 065062, with no Community Rating System class, so no CRS discount applies. Whether a specific parcel sits in a mapped special flood hazard area is an address level question the platform answers.
Are the county figures on this page South San Francisco figures?
No, and they are labeled so. County Business Patterns, QCEW, the Building Permits Survey, BEA product and IRS migration are published for San Mateo County as a whole and there is no place level equivalent. They appear in one clearly marked section as context and are never presented as measurements of South San Francisco.
Is zoning published for South San Francisco?
No. Nothing on this page presents parcel level zoning.