Government Code › TITLE 3. GOVERNMENT OF COUNTIES › DIVISION 1. COUNTIES GENERALLY › CHAPTER 4. County Seats › ARTICLE 1. Location of County SeatsGovernment Code § 23639‹ § 23638§ 23640 ›Copy linkOpen in browserleginfo ↗23639.The county seat of San Mateo is Redwood City.(Added by Stats. 1947, Ch. 424.)