We currently have 5 conventional police frequencies for Contra Costa in Contra Costa as well as 85 countywide trunking frequencies and 41 countywide talkgroups in our database. View Contra Costa police frequencies sorted by city.
| Agency | Description | Radio Freq | FCC License |
| Contra Costa County Sheriff | Contra Costa County Sheriff - Dispatch | 460.1000 | N/A |
| Contra Costa County Sheriff | Contra Costa County Sheriff - Dispatch | 460.2750 | N/A |
| Contra Costa County Sheriff | Contra Costa County Sheriff - Dispatch | 461.2250 | N/A |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 856.4375 | N/A |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 857.2375 | N/A |
System name: East Bay Regional Communications System (EBRCS)
System type: Project 25 Phase I
| County | Trunking Freq |
| Alameda, Contra Costa | 769.09375 |
| Alameda, Contra Costa | 769.25625 |
| Alameda, Contra Costa | 769.29375 |
| Alameda, Contra Costa | 769.33125 |
| Alameda, Contra Costa | 769.58125 |
| Alameda, Contra Costa | 769.76875 |
| Alameda, Contra Costa | 769.83125 |
| Alameda, Contra Costa | 769.86875 |
| Alameda, Contra Costa | 770.01875 |
| Alameda, Contra Costa | 770.05625 |
| Alameda, Contra Costa | 770.29375 |
| Alameda, Contra Costa | 770.33125 |
| Alameda, Contra Costa | 770.36875 |
| Alameda, Contra Costa | 770.53125 |
| Alameda, Contra Costa | 770.56875 |
| Alameda, Contra Costa | 770.60625 |
| Alameda, Contra Costa | 770.76875 |
| Alameda, Contra Costa | 770.84375 |
| Alameda, Contra Costa | 771.04375 |
| Alameda, Contra Costa | 771.08125 |
| Alameda, Contra Costa | 771.11875 |
| Alameda, Contra Costa | 771.19375 |
| Alameda, Contra Costa | 771.30625 |
| Alameda, Contra Costa | 771.34375 |
| Alameda, Contra Costa | 771.49375 |
| Alameda, Contra Costa | 771.56875 |
| Alameda, Contra Costa | 771.60625 |
| Alameda, Contra Costa | 771.64375 |
| Alameda, Contra Costa | 771.75625 |
| Alameda, Contra Costa | 771.79375 |
| Alameda, Contra Costa | 771.90625 |
| Alameda, Contra Costa | 771.94375 |
| Alameda, Contra Costa | 772.01875 |
| Alameda, Contra Costa | 772.05625 |
| Alameda, Contra Costa | 772.09375 |
| Alameda, Contra Costa | 772.24375 |
| Alameda, Contra Costa | 772.31875 |
| Alameda, Contra Costa | 772.35625 |
| Alameda, Contra Costa | 772.39375 |
| Alameda, Contra Costa | 772.50625 |
| Alameda, Contra Costa | 772.54375 |
| Alameda, Contra Costa | 772.65625 |
| Alameda, Contra Costa | 772.69375 |
| Alameda, Contra Costa | 772.76875 |
| Alameda, Contra Costa | 772.80625 |
| Alameda, Contra Costa | 772.84375 |
| Alameda, Contra Costa | 772.88125 |
| Alameda, Contra Costa | 772.99375 |
| Alameda, Contra Costa | 773.15625 |
| Alameda, Contra Costa | 773.19375 |
| Alameda, Contra Costa | 773.23125 |
| Alameda, Contra Costa | 773.46875 |
| Alameda, Contra Costa | 773.66875 |
| Alameda, Contra Costa | 773.74375 |
| Alameda, Contra Costa | 773.90625 |
| Alameda, Contra Costa | 773.98125 |
| Alameda, Contra Costa | 774.14375 |
| Alameda, Contra Costa | 774.18125 |
| Alameda, Contra Costa | 774.21875 |
| Alameda, Contra Costa | 774.38125 |
| Alameda, Contra Costa | 774.45625 |
| Alameda, Contra Costa | 774.49375 |
| Alameda, Contra Costa | 774.73125 |
| Alameda, Contra Costa | 774.89375 |
| Alameda, Contra Costa | 851.33750 |
| Alameda, Contra Costa | 851.35000 |
| Alameda, Contra Costa | 851.36250 |
| Alameda, Contra Costa | 852.43750 |
| Alameda, Contra Costa | 852.45000 |
| Alameda, Contra Costa | 852.60000 |
| Alameda, Contra Costa | 852.61250 |
| Alameda, Contra Costa | 852.62500 |
| Alameda, Contra Costa | 852.77500 |
| Alameda, Contra Costa | 852.92500 |
| Alameda, Contra Costa | 852.93750 |
| Alameda, Contra Costa | 852.95000 |
| Alameda, Contra Costa | 853.13750 |
| Alameda, Contra Costa | 853.28750 |
| Alameda, Contra Costa | 853.30000 |
| Alameda, Contra Costa | 853.56250 |
| Alameda, Contra Costa | 853.58750 |
| Alameda, Contra Costa | 853.73750 |
| Alameda, Contra Costa | 853.75000 |
| Alameda, Contra Costa | 853.93750 |
| Alameda, Contra Costa | 853.95000 |
System name: East Bay Regional Communications System (EBRCS)
System type: Project 25 Phase I
| Agency | Description | Talkgroup |
| Alameda County Sheriff | Alameda County Sheriff - Alternate | 3714 |
| Alameda County Sheriff | Alameda County Sheriff - Alternate | 3715 |
| Alameda County Sheriff | Alameda County Sheriff - Alternate | 3719 |
| Alameda County Sheriff | Alameda County Sheriff - Alternate | 3720 |
| Alameda County Sheriff | Alameda County Sheriff - Alternate | 3721 |
| Alameda County Sheriff | Alameda County Sheriff - Alternate | 3722 |
| Alameda County Sheriff | Alameda County Sheriff - Alternate | 3723 |
| Alameda County Sheriff | Alameda County Sheriff - Dispatch | 3705 |
| Alameda County Sheriff | Alameda County Sheriff - Dispatch | 3707 |
| Alameda County Sheriff | Alameda County Sheriff - Dispatch | 3709 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3706 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3708 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3710 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3711 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3712 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3713 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3724 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3725 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3726 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3727 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3728 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3729 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3730 |
| Alameda County Sheriff | Alameda County Sheriff - TAC | 3731 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - Alternate | 7705 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - Dispatch | 7712 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - Dispatch | 7713 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - Dispatch | 7715 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - Dispatch | 7726 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 7706 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 7708 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 7716 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 7717 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 7718 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 7721 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 7722 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 7723 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 7724 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 7725 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 7805 |
| Contra Costa County Sheriff | Contra Costa County Sheriff - TAC | 7806 |
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