| Timezone | Central Time |
| Area | 63.23 sq mi |
| Population | 68,380 (More Details) |
|
| Male Population | 33,154 (48.5%) |
| Female Population | 35,226 (51.5%) |
| Median Age | 36.1 |
| Zip Codes | 50648, 50701, 50702 (3 more) |
| Area Code | 319 |
6 Zip Codes in Waterloo, Iowa
| Zip Code | City | Administrative Region | Population | Median Age | Area |
|---|
| 50648 | Waterloo, Iowa | Iowa | 4,054 | 38.1 | 86.19 sq mi |
| 50701 | Waterloo, Iowa | Iowa | 30,926 | 37.9 | 82.89 sq mi |
| 50702 | Waterloo, Iowa | Iowa | 19,836 | 36.4 | 9.91 sq mi |
| 50703 | Waterloo, Iowa | Iowa | 19,899 | 35.6 | 94.45 sq mi |
| 50704 | Waterloo, Iowa | Iowa | — | — | — |
| 50707 | Evansdale, Iowa | Iowa | 8,321 | 37.6 | 9.82 sq mi |
Waterloo, Iowa Demographic Information
| Population | 68,380 |
| Population Density | 1,081 / mi² |
| Male Population | 33,154 (48.5%) |
| Female Population | 35,226 (51.5%) |
| Median Age | 36.1 |
| Male Median Age | 34.7 |
| Female Median Age | 37.5 |
| Businesses in Waterloo, Iowa | 4,913 |
| Population (1975) | 53,481 |
| Population (2000) | 67,006 |
| Population change from 1975 to 2015 | +27.9% |
| Population change from 2000 to 2015 | +2.1% |
