Pleasant Hill: 2026 Contra Costa County Block Party – Sept. 29

Contra Costa County is bringing its popular annual Block Party to Central County in partnership with the City of Pleasant Hill and Supervisor Ken Carlson’s Office.

This free, family-friendly celebration combines fun with convenience, giving residents the chance to connect with their local government in one lively location. County departments—including the Contra Costa Public Defender’s Office, Clerk-Recorder-Elections Department, Employment & Human Services Department, County Public Works, and Contra Costa Health—will join the City of Pleasant Hill to offer a wide range of on-the-spot services, helpful resources, and community information, all while enjoying a festive atmosphere with activities for all ages.