29 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 94901 | San Rafael | 40,927 |
| 94952 | Petaluma | 33,519 |
| 94941 | Mill Valley | 32,190 |
| 94903 | San Rafael | 31,582 |
| 94947 | Novato | 25,183 |
| 94949 | Novato | 18,545 |
| 94945 | Novato | 17,309 |
| 94960 | San Anselmo | 16,028 |
| 94904 | Greenbrae | 13,132 |
| 94920 | Belvedere Tiburon | 12,906 |
| 94965 | Sausalito | 12,044 |
| 94925 | Corte Madera | 10,155 |
| 94930 | Fairfax | 8,748 |
| 94939 | Larkspur | 7,488 |
| 94957 | Ross | 2,081 |
| 94964 | San Quentin | 2,054 |
| 94973 | Woodacre | 1,438 |
| 94924 | Bolinas | 1,342 |
| 94933 | Forest Knolls | 1,284 |
| 94956 | Point Reyes Station | 1,189 |
| 94937 | Inverness | 938 |
| 94946 | Nicasio | 673 |
| 94963 | San Geronimo | 462 |
| 94929 | Dillon Beach | 442 |
| 94938 | Lagunitas | 428 |
| 94970 | Stinson Beach | 400 |
| 94971 | Tomales | 364 |
| 94940 | Marshall | 260 |
| 94950 | Olema | 23 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 29 ZCTAs in Marin County, California (US Census).