| Place Name | Columbus Junction |
| Place Type | City |
| ZIP Code(s) | 52738 |
| County | Louisa County |
| Area Code(s) | 319 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 2,122 |
| Population Growth Rate (2010-19) | -3.63% |
| Majority Ethnicity | White 47.53% |
| US Congressional District(s) | Iowa 2nd |
| State House Districts | 88 |
| State Senate Districts | 44 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 47.53% |
| African American | 2.18% |
| Hispanic | 0% |
| Asian | 15.8% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 34.49% |