Government Code › TITLE 3. GOVERNMENT OF COUNTIES › DIVISION 1. COUNTIES GENERALLY › CHAPTER 4. County Seats › ARTICLE 1. Location of County SeatsGovernment Code § 23618‹ § 23617§ 23619 ›Copy linkOpen in browserleginfo ↗23618.The county seat of Lassen is Susanville.(Added by Stats. 1947, Ch. 424.)