29 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 93033 | Oxnard | 80,482 |
| 93065 | Simi Valley | 72,585 |
| 93030 | Oxnard | 58,573 |
| 93063 | Simi Valley | 56,110 |
| 93003 | Ventura | 52,511 |
| 93036 | Oxnard | 47,938 |
| 93010 | Camarillo | 46,715 |
| 91320 | Newbury Park | 43,628 |
| 91360 | Thousand Oaks | 42,315 |
| 93021 | Moorpark | 37,702 |
| 91362 | Thousand Oaks | 36,205 |
| 93012 | Camarillo | 36,007 |
| 93060 | Santa Paula | 34,640 |
| 93001 | Ventura | 31,885 |
| 93004 | Ventura | 31,326 |
| 93035 | Oxnard | 26,476 |
| 93041 | Port Hueneme | 23,179 |
| 93023 | Ojai | 21,559 |
| 93015 | Fillmore | 18,917 |
| 91361 | Westlake Village | 18,728 |
| 91377 | Oak Park | 13,656 |
| 93022 | Oak View | 5,929 |
| 93225 | Frazier Park | 4,532 |
| 93066 | Somis | 2,979 |
| 93040 | Piru | 1,904 |
| 93252 | Maricopa | 1,429 |
| 93043 | Port Hueneme Cbc Base | 549 |
| 93042 | Point Mugu Nawc | 107 |
| 93064 | Brandeis | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 29 ZCTAs in Ventura County, California (US Census).