Census tracts · South San Francisco, CA

Census tracts in South San Francisco, California

14 census tracts lie mostly within South San Francisco, and 2 more reach into it, by the 2020 census blocks they share. Median household income runs from $82,679 in Tract 6021 to $186,974 in Tract 6017, against $136,578 for South San Francisco as a whole (ACS 2020-2024 5-year estimates).

Which census tracts of South San Francisco earn the most and the least?

The five tracts with the highest and the lowest median household income among those mostly within South San Francisco and with a reliable estimate.

Tract 6017 $186,974
Tract 6020.01 $176,389
Tract 6026.02 $170,274
Tract 6020.02 $162,143
Tract 6025 $161,279
Tract 6024 $120,699
Tract 6019.01 $103,472
Tract 6022.01 $92,617
Tract 6022.02 $92,191
Tract 6021 $82,679

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov

Every census tract in South San Francisco

Sort by any column; the share column is how much of each tract's land (by 2020 census blocks) lies inside South San Francisco.

Census tracts in or partly in South San Francisco, ACS 2020-2024 5-year estimates. Distance and direction from the Census Bureau's internal point of South San Francisco (2024 Gazetteer), which is not always its downtown

Tract 601706081601700	4.4 mi west	San Mateo County	4,461±484	$186,974	$1,076,300	$3,164	100%
Tract 6019.0106081601901	3.3 mi west	San Mateo County	3,951±541	$103,472	$1,280,300	$2,408	100%
Tract 6019.0206081601902	3.4 mi west	San Mateo County	4,960±817	$125,096	$951,600	$2,746	100%
Tract 6020.0106081602001	2.4 mi west	San Mateo County	4,147±495	$176,389	$1,396,300	$2,240	100%
Tract 602106081602100	1.7 mi west	San Mateo County	3,262±520	$82,679	$1,278,000	$2,475	100%
Tract 6022.0106081602201	2.6 mi west	San Mateo County	5,250±839	$92,617	$1,170,500	$2,445	100%
Tract 6022.0206081602202	1.9 mi west	San Mateo County	3,054±507	$92,191	$949,500	$2,365	100%
Tract 602306081602300	1.3 mi west	San Mateo County	4,245±731	$146,750	$1,144,800	$3,054	100%
Tract 602506081602500	4.2 mi west	San Mateo County	5,331±656	$161,279	$1,295,800	$3,500 or more	100%
Tract 6026.0106081602601	4.5 mi west	San Mateo County	3,932±470	$149,044	$1,118,200	$3,500 or more	100%
Tract 6026.0206081602602	5.0 mi west	San Mateo County	4,289±1,089	$170,274	$954,100	$3,223	100%
Tract 601806081601800	3.8 mi west	San Mateo County	6,025±698	$143,138	$1,325,600	$3,067	93%
Tract 602406081602400	3.3 mi west	San Mateo County	7,339±663	$120,699	$1,237,400	$2,821	87%
Tract 6020.0206081602002	2.7 mi northwest	San Mateo County	3,783±767	$162,143	$1,114,700	$3,250	84%
Tract 990106081990100	8.4 mi west	San Mateo County	0±14	not published	not published	not published	9%
Tract 600106081600100	2.9 mi northwest	San Mateo County	5,295±345	$156,310	$1,240,900	$2,653	2%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files · Census block assignment files

How these figures are made: methodology and release checks · reading a margin of error · every state · corrections