29 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 94901 | San Rafael | 41,307 |
| 94952 | Petaluma | 33,785 |
| 94941 | Mill Valley | 32,706 |
| 94903 | San Rafael | 30,615 |
| 94947 | Novato | 24,100 |
| 94949 | Novato | 17,787 |
| 94945 | Novato | 17,635 |
| 94960 | San Anselmo | 16,232 |
| 94904 | Greenbrae | 12,815 |
| 94920 | Belvedere Tiburon | 12,609 |
| 94965 | Sausalito | 11,724 |
| 94925 | Corte Madera | 10,077 |
| 94930 | Fairfax | 8,406 |
| 94939 | Larkspur | 7,315 |
| 94964 | San Quentin | 2,344 |
| 94957 | Ross | 2,321 |
| 94973 | Woodacre | 1,689 |
| 94924 | Bolinas | 1,372 |
| 94956 | Point Reyes Station | 1,080 |
| 94933 | Forest Knolls | 1,033 |
| 94937 | Inverness | 1,009 |
| 94963 | San Geronimo | 739 |
| 94946 | Nicasio | 715 |
| 94938 | Lagunitas | 437 |
| 94929 | Dillon Beach | 293 |
| 94971 | Tomales | 276 |
| 94970 | Stinson Beach | 255 |
| 94940 | Marshall | 148 |
| 94950 | Olema | 22 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 29 ZCTAs in Marin County, California (US Census).