City Guide
South San Francisco
The Industrial City
Birthplace of biotechnology on the Peninsula — where "The Industrial City" sign crowns hillside neighborhoods above a world-class life-sciences corridor
South San Francisco occupies the northern Bayshore of San Mateo County, a city of roughly 66,000 residents whose identity has been shaped by heavy industry, meatpacking, steel production, and — since the 1970s — biotechnology and pharmaceutical research. The illuminated "South San Francisco The Industrial City" sign on Sign Hill remains a regional landmark above a community that has evolved from factory town to global life-sciences hub.
Indigenous / Early History
Ohlone peoples used the northern Peninsula bayshore and San Bruno Mountain slopes for hunting, shellfish gathering, and seasonal camps. Tidal marshes along the Bayshore supported rich ecological communities that indigenous stewards managed for millennia. American-era land use transformed the marshes through salt ponds, agriculture, and eventually heavy industrial development along the waterfront.
Founding & Early Development
South San Francisco is established as an industrial town, with steel mills, meatpacking plants, and factories along the Bayshore.
The city incorporates, formalizing governance over a working-class industrial community.
The "Industrial City" sign is erected on Sign Hill, becoming a enduring civic symbol.
Unlike residential suburbs to the south, South San Francisco was founded for production — steel, meat, and manufacturing employed generations of workers who lived in neighborhoods climbing the hillside above the industrial flats.
Twentieth-Century Growth
The city's economy shifted from heavy industry toward biotechnology beginning in the 1970s, when Genentech established operations in South San Francisco — founding the modern biotech industry. The "Genentech South San Francisco" campus and subsequent development created a life-sciences cluster that now includes dozens of pharmaceutical and biotechnology firms along the Bayshore corridor.
Genentech founded in South San Francisco, launching the biotechnology industry.
Biotech campus expansion transforms the Bayshore into a research and manufacturing corridor.
Oyster Point development adds office and research space along the bayfront.
Economy & Employment
South San Francisco's economy is dominated by biotechnology, pharmaceuticals, and life-sciences research. Major employers include Genentech (Roche), Thermo Fisher Scientific, and dozens of biotech firms in the "South San Francisco" cluster. Legacy industrial uses continue on portions of the Bayshore. Retail along Grand Avenue and at Westborough Square serves local residents. Many workers commute from throughout the Bay Area to the biotech campuses.
Market & Housing Context
Public records from city planning departments and county assessor data provide context for land use and housing trends without constituting financial guidance.
The 2020 U.S. Census recorded 66,105 residents and 22,683 total housing units in South San Francisco. Census data indicate approximately 57 percent owner-occupied and 43 percent renter-occupied households. Housing types include hillside single-family neighborhoods with views of the bay, apartments along El Camino Real and near BART, and newer development near the biotech corridor. The city's 41 percent Asian population share (2020 Census) reflects immigration patterns that have reshaped neighborhood character over recent decades.
Living in South San Francisco
Sunshine Gardens and Avalon Park neighborhoods climb the hillside above the Bayshore, offering views and a residential atmosphere separate from the biotech campuses below. Grand Avenue's restaurants reflect Chinese, Filipino, and Latin American culinary traditions among the city's diverse households.
Sign Hill Park offers hiking trails beneath the historic "Industrial City" sign. Orange Park and Centennial Way provide neighborhood recreation. Grand Avenue's downtown features restaurants reflecting the city's diverse population. The South San Francisco BART station connects residents to San Francisco and the East Bay. Public schools are operated by the South San Francisco Unified School District. The city hosts cultural events including the South San Francisco Conference Center gatherings and community festivals.
South San Francisco Today
66,105
Population (2020 Census)
9.1 sq mi
Incorporated Land Area
22,683
Total Housing Units (2020 Census)
1908
Year of Incorporation
Government and Civic Life
South San Francisco operates under a council-manager government. City planning balances biotech campus expansion, hillside neighborhood preservation, and housing element requirements. The city's fiscal health benefits from commercial and industrial tax revenue generated by the life-sciences cluster.
Life-Sciences Campus District
The concentration of biotechnology buildings along DNA Way and adjacent streets creates a research campus environment unlike any other Peninsula municipality. Security, shuttle, and parking infrastructure serve thousands of daily workers whose employers conduct clinical trials, drug manufacturing, and genomic research within city limits.
Geography & Environment
South San Francisco rises from Bayshore flats to Sign Hill and the lower slopes of San Bruno Mountain. Tidal marshes and bayfront land support both biotech campuses and restoration projects. The city's hillside neighborhoods offer views of the bay, airport, and San Francisco skyline. Fog and bay breezes moderate the climate.
Regional agencies including the Metropolitan Transportation Commission, SamTrans, and Caltrain coordinate service improvements that affect daily commuting patterns for residents employed throughout the Bay Area. City officials participate in these forums to represent local priorities on transit funding, highway maintenance, and Peninsula growth management.
Transportation & Connectivity
U.S. Highway 101 passes through South San Francisco, connecting the city to San Francisco and Silicon Valley. The South San Francisco BART station provides regional rail access. Caltrain serves nearby stations in San Bruno and Millbrae. San Francisco International Airport lies immediately north. SamTrans bus routes serve local and regional corridors.
Sign Hill's hiking trails and the illuminated sign itself draw visitors who photograph the landmark visible from U.S. Highway 101 and surrounding hillside neighborhoods.
South San Francisco's public art program includes installations near biotech campuses and along Grand Avenue, reflecting the city's industrial and scientific identity.
Looking Forward
South San Francisco continues biotech campus expansion, Oyster Point bayfront development, and housing construction near transit. City officials address the balance between industrial employment and residential quality of life on the hillside. Regional planning for Bayshore corridors and sea-level rise affects bayfront districts.
The city's economic development department actively recruits life-sciences firms to the Oyster Point and East of 101 districts, extending the biotech cluster south from Genentech's original campus.
The City's Character
South San Francisco transformed from steel and meatpacking to monoclonal antibodies and gene therapy — yet the "Industrial City" sign still glows above a community that wears its working identity with pride.
"South San Francisco kept the sign and changed the industry — from steel mills to biotech labs, the Industrial City reinvented itself without renaming the hill."
From the glow of the hillside sign to the campuses along the Bayshore, residents experience a city that has repeatedly reinvented its economy while maintaining a distinct civic identity at the northern edge of San Mateo County.