For 2026, the sales tax rate in Alameda County, California stands at 10.25% — a combination of the 7.25% state rate and 3% local levy. The county's 1,680,000 residents make it an important market in the region.
For a $500 purchase in Alameda County, the sales tax would be $51.25, bringing the total to $551.25.
Business Compliance in Alameda County
Businesses must register with the California Department of Tax and Fee Administration (CDTFA) to collect and remit sales tax. Filing frequency depends on sales volume. With a population of 1,680,000, Alameda County offers significant market potential for businesses of all sizes.