v3.25.2
Cover
Jun. 18, 2025
Cover [Abstract]  
Document Type 8-K
Document Period End Date Jun. 18, 2025
Entity Registrant Name FIVE STAR BANCORP
Entity Incorporation, State or Country Code CA
Entity File Number 001-40379
Entity Tax Identification Number 75-3100966
Entity Address, Address Line One 3100 Zinfandel Drive, Suite 100
Entity Address, City or Town Rancho Cordova
Entity Address, State or Province CA
Entity Address, Postal Zip Code 95670
City Area Code 916
Local Phone Number 626-5000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, no par value per share
Trading Symbol FSBC
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Central Index Key 0001275168
Amendment Flag false