Williams, CA ZIP Codes & Directory
Williams is located in Colusa County in California. Browse all active 5-digit USPS ZIP codes serving Williams and surrounding Colusa County delivery districts.
All ZIP Codes in Williams, CA
1 CodesAbout Williams Mail Delivery & Postal Administration
ZIP codes in Williams are administered by the United States Postal Service. Delivery routes are coordinated through regional Sectional Center Facilities (SCFs) servicing Colusa County and surrounding California metropolitan districts.
Frequently Asked Questions About Williams, CA ZIP Codes
How many ZIP codes serve Williams, California? ▾
Williams, California is served by 1 active USPS postal delivery codes: 95987.
What county is Williams located in? ▾
Williams is an incorporated city located within Colusa County, California.
What is the population and demographic size of Williams? ▾
According to official U.S. Census Bureau data, Williams has an estimated population of 6,270 residents and is situated within the undefined.
How does mail sorting and delivery work in Williams? ▾
Mail delivery in Williams is operated by the United States Postal Service (USPS) through regional Sectional Center Facility (SCF) distribution plants servicing Colusa County and surrounding California counties.
How much does it cost to ship a package to Williams, CA? ▾
Shipping costs to Williams depend on the package weight, dimensions, shipping carrier (USPS, UPS, FedEx), and the distance from the origin ZIP code. To calculate exact postage rates, use our shipping cost estimator tool.
What is the standard delivery time for mail to Williams? ▾
Standard USPS Ground Advantage typically takes 2-5 business days to reach Williams, depending on the origin. Priority Mail generally arrives in 1-3 business days. Please check tracking for specific regional routing times.