If available, see below for a list of known police frequencies for San Mateo County in California. Or, navigate to your city or town to view your local city and/or police frequencies within San Mateo County, California.
| Frequency | Description | Agency | |
|---|---|---|---|
| 484.4875 | San Mateo County Sheriff - Alternate | San Mateo County Sheriff | |
| 488.5375 | San Mateo County Sheriff - TAC | San Mateo County Sheriff | |
| 488.7125 | San Mateo County Sheriff - TAC | San Mateo County Sheriff | |
| 488.8625 | San Mateo County Sheriff - TAC | San Mateo County Sheriff | |
| 488.8875 | San Mateo County Sheriff - TAC | San Mateo County Sheriff |
Below are any San Mateo County trunking scanner frequencies and their corresponding talkgroups (decimals). Be sure to check the system name of each frequency and talkgroup to make sure you are inputting everything correctly into your scanner (some systems are different types, so you'll need to input each system separately).
| System Name | System Type | Frequency |
|---|---|---|
| San Mateo County | Project 25 Phase I | 769.10625 |
| San Mateo County | Project 25 Phase I | 769.30625 |
| San Mateo County | Project 25 Phase I | 769.34375 |
| San Mateo County | Project 25 Phase I | 770.03125 |
| San Mateo County | Project 25 Phase I | 770.30625 |
| San Mateo County | Project 25 Phase I | 771.05625 |
| San Mateo County | Project 25 Phase I | 771.28125 |
| ||
| San Mateo County | Project 25 Phase I | 771.35625 |
| San Mateo County | Project 25 Phase I | 771.43125 |
| San Mateo County | Project 25 Phase I | 771.58125 |
| San Mateo County | Project 25 Phase I | 771.80625 |
| San Mateo County | Project 25 Phase I | 771.88125 |
| San Mateo County | Project 25 Phase I | 772.03125 |
| San Mateo County | Project 25 Phase I | 772.10625 |
| ||
| San Mateo County | Project 25 Phase I | 772.18125 |
| San Mateo County | Project 25 Phase I | 772.25625 |
| San Mateo County | Project 25 Phase I | 772.40625 |
| San Mateo County | Project 25 Phase I | 772.63125 |
| San Mateo County | Project 25 Phase I | 772.70625 |
| San Mateo County | Project 25 Phase I | 772.78125 |
| San Mateo County | Project 25 Phase I | 772.93125 |
| ||
| San Mateo County | Project 25 Phase I | 773.40625 |
| San Mateo County | Project 25 Phase I | 773.48125 |
| San Mateo County | Project 25 Phase I | 773.88125 |
| San Mateo County | Project 25 Phase I | 773.96875 |
| San Mateo County | Project 25 Phase I | 774.63125 |
| San Mateo County | Project 25 Phase I | 774.70625 |
| System Name | Talkgroup | Description |
|---|---|---|
| San Mateo County | 817 | San Mateo County Sheriff - Dispatch |
| San Mateo County | 865 | San Mateo County Sheriff - Dispatch |
| San Mateo County | 866 | San Mateo County Sheriff - Dispatch |
| San Mateo County | 914 | San Mateo County Sheriff - Dispatch |
| San Mateo County | 525 | San Mateo County Sheriff - TAC |
| San Mateo County | 526 | San Mateo County Sheriff - TAC |
| San Mateo County | 527 | San Mateo County Sheriff - TAC |
| San Mateo County | 528 | San Mateo County Sheriff - TAC |
| San Mateo County | 609 | San Mateo County Sheriff - TAC |
| San Mateo County | 818 | San Mateo County Sheriff - TAC |
| San Mateo County | 819 | San Mateo County Sheriff - TAC |
| San Mateo County | 820 | San Mateo County Sheriff - TAC |
| ||
| San Mateo County | 821 | San Mateo County Sheriff - TAC |
| San Mateo County | 822 | San Mateo County Sheriff - TAC |
| San Mateo County | 849 | San Mateo County Sheriff - TAC |
| San Mateo County | 850 | San Mateo County Sheriff - TAC |
| San Mateo County | 851 | San Mateo County Sheriff - TAC |
| San Mateo County | 852 | San Mateo County Sheriff - TAC |
| San Mateo County | 853 | San Mateo County Sheriff - TAC |
| San Mateo County | 854 | San Mateo County Sheriff - TAC |
| San Mateo County | 855 | San Mateo County Sheriff - TAC |
| San Mateo County | 856 | San Mateo County Sheriff - TAC |
| San Mateo County | 857 | San Mateo County Sheriff - TAC |
| San Mateo County | 858 | San Mateo County Sheriff - TAC |
| ||
| San Mateo County | 859 | San Mateo County Sheriff - TAC |
| San Mateo County | 860 | San Mateo County Sheriff - TAC |
| San Mateo County | 861 | San Mateo County Sheriff - TAC |
| San Mateo County | 862 | San Mateo County Sheriff - TAC |
| San Mateo County | 863 | San Mateo County Sheriff - TAC |
| San Mateo County | 864 | San Mateo County Sheriff - TAC |
| San Mateo County | 867 | San Mateo County Sheriff - TAC |
| San Mateo County | 868 | San Mateo County Sheriff - TAC |
| San Mateo County | 869 | San Mateo County Sheriff - TAC |
| San Mateo County | 870 | San Mateo County Sheriff - TAC |
| San Mateo County | 871 | San Mateo County Sheriff - TAC |
| San Mateo County | 872 | San Mateo County Sheriff - TAC |
| ||
| San Mateo County | 873 | San Mateo County Sheriff - TAC |
| San Mateo County | 874 | San Mateo County Sheriff - TAC |
| San Mateo County | 875 | San Mateo County Sheriff - TAC |
| San Mateo County | 876 | San Mateo County Sheriff - TAC |
| San Mateo County | 877 | San Mateo County Sheriff - TAC |
| San Mateo County | 878 | San Mateo County Sheriff - TAC |
| San Mateo County | 879 | San Mateo County Sheriff - TAC |
| San Mateo County | 880 | San Mateo County Sheriff - TAC |
| San Mateo County | 884 | San Mateo County Sheriff - TAC |
| San Mateo County | 886 | San Mateo County Sheriff - TAC |
Detect police activity and stay ticket-free in San Mateo County with these police radar detectors.