29 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 93033 | Oxnard | 82,517 |
| 93065 | Simi Valley | 72,086 |
| 93030 | Oxnard | 58,511 |
| 93063 | Simi Valley | 57,075 |
| 93003 | Ventura | 53,283 |
| 93010 | Camarillo | 47,656 |
| 93036 | Oxnard | 46,959 |
| 91320 | Newbury Park | 44,138 |
| 91360 | Thousand Oaks | 42,444 |
| 93021 | Moorpark | 37,980 |
| 91362 | Thousand Oaks | 36,770 |
| 93012 | Camarillo | 36,145 |
| 93060 | Santa Paula | 34,337 |
| 93001 | Ventura | 31,751 |
| 93004 | Ventura | 31,151 |
| 93035 | Oxnard | 26,286 |
| 93041 | Port Hueneme | 23,108 |
| 93023 | Ojai | 21,279 |
| 91361 | Westlake Village | 18,753 |
| 93015 | Fillmore | 18,716 |
| 91377 | Oak Park | 13,627 |
| 93022 | Oak View | 6,422 |
| 93225 | Frazier Park | 5,018 |
| 93066 | Somis | 2,805 |
| 93040 | Piru | 1,838 |
| 93252 | Maricopa | 1,680 |
| 93043 | Port Hueneme Cbc Base | 722 |
| 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).