Williams is a city in Colusa County, California, home to about 5,585 people across 4.9 square miles. Its ZIP code is 95987.
Homes sold for a median of $235 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Williams. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Williams’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Sacramento International Airport (SMF)45 miles away |
|---|---|
| Nearest city of 250,000+ | Sacramento, CA56 miles away |
| Nearest city of 1 million+ | Los Angeles, CA411 miles away |
Straight-line distances from the center of Williams; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Williams had 5,538 residents in the 2020 census, up 51% since 2000.
It’s the 633rd largest of 1,563 towns in California by population.
Colusa County grew from 7,364 residents in 1900 to 21,839 in 2020.
Colusa County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 92°F in summer, and winter lows average 38°F. About 17.2 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Colusa 2 Ssw, CA weather station (11 miles away).
4,552 jobs at 417 businesses in Colusa County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
7 doctors and other health care providers list an office in Williams.
Nearest hospitals
Providers with an office here
| Primary care doctors | 1 |
|---|---|
| Dentists | 1 |
| Mental health providers | 3 |
| Physical and occupational therapists | 1 |
| Chiropractors | 1 |
| Pharmacies | 1 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Grocery stores
Libraries
Museums
Counts are within about 1.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1920.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Colusa County Office of Education, Williams Unified. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Coastal Buttes AcademyWilliams | K–12 | 12 | Special Education | 4.6 mi |
| Williams Primary ElementaryWilliams | K–3 | 407 | Public | 3.3 mi |
| Williams Upper ElementaryWilliams | 4–6 | 289 | Public | 3.5 mi |
| S. William Abel AcademyWilliams | 7–12 | 43 | Alternative Education | 4.6 mi |
| Williams Junior/Senior HighWilliams | 7–12 | 588 | Public | 3.5 mi |
| Mid Valley High (Continuation)Williams | 10–12 | 19 | Alternative Education | 3.4 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.