20 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 14094 | Lockport | 50,526 |
| 14120 | North Tonawanda | 44,379 |
| 14304 | Niagara Falls | 28,965 |
| 14305 | Niagara Falls | 16,433 |
| 14301 | Niagara Falls | 11,448 |
| 14092 | Lewiston | 10,318 |
| 14132 | Sanborn | 6,432 |
| 14303 | Niagara Falls | 6,210 |
| 14174 | Youngstown | 5,768 |
| 14131 | Ransomville | 5,339 |
| 14108 | Newfane | 5,301 |
| 14105 | Middleport | 5,113 |
| 14067 | Gasport | 4,063 |
| 14172 | Wilson | 3,019 |
| 14012 | Barker | 2,944 |
| 14008 | Appleton | 1,484 |
| 14028 | Burt | 1,377 |
| 14109 | Niagara University | 1,341 |
| 14126 | Olcott | 301 |
| 14302 | Niagara Falls | 209 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 20 ZCTAs in Niagara County, New York (US Census).