ZIP guide — public records, sourced

94401: San Mateo, CA

The public records behind ZIP 94401 — the registry count for the ZIP itself, and the FBI-reported crime record for San Mateo County, its county. Every figure sourced and dated. For a specific home, run the free preview: the flood determination and the full record check happen at the address, live.

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28
Registrants in ZIP 94401
1 in 1,326
Residents per registrant
14,975
San Mateo County offenses reported, 2024
20.16
San Mateo County crimes per 1,000 / yr

Registered sex offenders in 94401

28 registrants are listed for ZIP 94401 — a ratio of 1 per 1,326 residents.

County baseline — San Mateo County overall: 1 per 1,542 residents.

Counts describe density, not danger by themselves; proximity to a specific address is what matters. This page publishes the count only — never names, photos, or registrant addresses. For the address-level check, search the official registry: the California Megan's Law Website (California Department of Justice), or every state at once through the federal NSOPW site.

One honest caveat: this count comes from a compilation of the state registry’s published data. Where a registry also lists work or school locations, a compilation count can read higher than a residence-only official count — the official search above is the deciding check for a specific address.

Source: City-Data compilation of California state registry data — count as of 2026-11-04. Compilation pulled 2026-11-04.

Compilation page for this ZIP: https://www.city-data.com/soz/soz-94401.html.

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Reported crime in San Mateo County — FBI 2024

FBI crime data is collected by law-enforcement agency, not by ZIP — so this is the record for San Mateo County, the county ZIP 94401 belongs to, labeled at county grain. San Mateo County is this ZIP’s county in the Census Bureau’s 2020 ZCTA-to-county crosswalk.

Agencies in San Mateo County reported 14,975 offenses to the FBI in 2024 — 1,983 violent and 12,992 property — a reported-crime rate of 20.16 per 1,000 residents (violent 266.9 and property 1,748.8 per 100,000).

Offense (2024, reported)Count
Murder11
Rape249
Robbery502
Aggravated assault1,221
Burglary961
Larceny-theft10,334
Motor vehicle theft1,697
Arson90

Coverage: 21 of 21 law-enforcement agencies assigned to this county reported at least one month of 2024 offense data to the FBI; 20 reported all 12 months. Counts are reported offenses only (FBI Return A / Arson master files), assigned whole to each agency's primary county; they are not adjusted for non-reporting agencies.

Source: FBI Crime Data Explorer (CDE) — UCR master files: Return A (Offenses Known and Clearances by Arrest) and Arson, data year 2024 — pulled 2026-11-04. These are offenses reported to law enforcement, not convictions, and not a verdict on any street or address.

San Mateo County and California context

San Mateo County is the records county for ZIP 94401. The county seat is Redwood City. Its 2024 Census Bureau population estimate is 742,893. The files that decide a purchase — assessor, recorder, permits, flood — live at the county and state level:

Flood risk is decided at the structure, not the ZIP — two houses on the same street can sit in different FEMA zones. The free preview at the top of this page runs the official FEMA determination at the exact address, live.

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Sources for this page

  • Sex-offender registry: City-Data compilation of California state registry data (count as of 2026-11-04); official search: California Megan's Law Website, California Department of Justice.
  • Crime: FBI Crime Data Explorer (CDE) UCR master files — Return A and Arson, data year 2024, pulled 2026-11-04; offenses assigned to each reporting agency’s primary county.
  • ZIP-to-county: U.S. Census Bureau, 2020 Census ZCTA5-to-County relationship file, pulled 2026-11-04; primary county = largest share of the ZCTA’s land area.
  • County context: population — U.S. Census Bureau 2024 Population Estimates Program; county seat — Wikidata (CC0), checked 2026-11-04.

Figures are shown as published by their sources on the dates noted and are refreshed as the underlying data updates. This page is research, not legal or financial advice.