We currently have 5 conventional police frequencies for San Mateo in San Mateo as well as 27 countywide trunking frequencies and 46 countywide talkgroups in our database. View San Mateo police frequencies sorted by city.
| Agency | Description | Radio Freq | FCC License |
| San Mateo County Sheriff | San Mateo County Sheriff - Alternate | 484.4875 | N/A |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 488.5375 | N/A |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 488.7125 | N/A |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 488.8625 | N/A |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 488.8875 | N/A |
System name: San Mateo County
System type: Project 25 Phase I
| County | Trunking Freq |
| San Mateo | 769.10625 |
| San Mateo | 769.30625 |
| San Mateo | 769.34375 |
| San Mateo | 770.03125 |
| San Mateo | 770.30625 |
| San Mateo | 771.05625 |
| San Mateo | 771.28125 |
| San Mateo | 771.35625 |
| San Mateo | 771.43125 |
| San Mateo | 771.58125 |
| San Mateo | 771.80625 |
| San Mateo | 771.88125 |
| San Mateo | 772.03125 |
| San Mateo | 772.10625 |
| San Mateo | 772.18125 |
| San Mateo | 772.25625 |
| San Mateo | 772.40625 |
| San Mateo | 772.63125 |
| San Mateo | 772.70625 |
| San Mateo | 772.78125 |
| San Mateo | 772.93125 |
| San Mateo | 773.40625 |
| San Mateo | 773.48125 |
| San Mateo | 773.88125 |
| San Mateo | 773.96875 |
| San Mateo | 774.63125 |
| San Mateo | 774.70625 |
System name: San Mateo County
System type: Project 25 Phase I
| Agency | Description | Talkgroup |
| San Mateo County Sheriff | San Mateo County Sheriff - Dispatch | 817 |
| San Mateo County Sheriff | San Mateo County Sheriff - Dispatch | 865 |
| San Mateo County Sheriff | San Mateo County Sheriff - Dispatch | 866 |
| San Mateo County Sheriff | San Mateo County Sheriff - Dispatch | 914 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 525 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 526 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 527 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 528 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 609 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 818 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 819 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 820 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 821 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 822 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 849 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 850 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 851 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 852 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 853 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 854 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 855 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 856 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 857 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 858 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 859 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 860 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 861 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 862 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 863 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 864 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 867 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 868 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 869 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 870 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 871 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 872 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 873 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 874 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 875 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 876 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 877 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 878 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 879 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 880 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 884 |
| San Mateo County Sheriff | San Mateo County Sheriff - TAC | 886 |
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