California has 20 licensed cannabis testing labs as of August 2026, operating across 10 cities. The count comes straight from the California Department of Cannabis Control licence database and refreshes weekly.
Compared
California has the most licensed cannabis testing labs of the 4 states where we track this licence class.
Top Cities
Methodology
Testing licences in California are issued by the California Department of Cannabis Control (CA DCC) and generally require ISO/IEC 17025 accreditation alongside the cannabis licence. Because the class is so small, this page is close to a complete census of the California market rather than a sample of it.
See the California testing lab list for the records behind this count, or the national cannabis testing lab statistics for every state at once.
FAQ
California has 20 licensed cannabis testing labs as of August 2026, spread across 10 cities. The count is verified against the California Department of Cannabis Control (CA DCC) licence database and refreshed weekly.
Los Angeles County leads California with 7 licensed testing labs, followed by Orange County with 4.
The California Department of Cannabis Control (CA DCC) public licence database. We re-crawl it weekly, deduplicate licensees, and drop closed or revoked licences, so the figure reflects testing labs actually operating — not every licence ever issued.
Yes. Business name, city, and state are free. A paid plan unlocks phone, email, address, licence details, and owner contacts for every California testing lab, with CSV export.
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