Updated Sep 2026
📍 991 Loring Ave, Crockett, CA, 94525
📞 510-787-2345
🌐 ccclib.org
📍 500 Court St Fl 1, Martinez, CA, 94553
📞 925-957-7100
Updated Oct 2026
📍 1236 Escobar St, Martinez, CA, 94553
📞 925-646-2278
🌐 ac5.org
County of Contra Costa is a government office located in Martinez, California. It serves the local community and has an active online presence as of 2026, indicating ongoing engagement with residents. Those seeking information or services from the county can visit this office for assistance.
📍 1122 Escobar St, Martinez, CA, 94553
📞 925-335-1600
📍 651 Pine St Fl 9, Martinez, CA, 94553
📞 925-335-1800
📍 651 Pine St Rm 108a, Martinez, CA, 94553
📞 925-335-8200
📍 625 Court St, Martinez, CA, 94553
📞 925-957-2850
📍 555 Escobar St, Martinez, CA, 94553
📞 925-335-7904
🌐 cocovote.us
📍 624 Ferry St, Martinez, CA, 94553
📞 925-646-2901
Updated Oct 2026
📍 725 Court St, Martinez, CA, 94553
📞 925-957-5638
🌐 https://cccpllib.org/
County of Contra Costa is a government office located in Martinez, California. It operates Monday through Friday from 8:00 AM to 5:00 PM, serving the local community with various governmental services. Residents can visit during these hours for assistance with county-related matters.