61261 Zip Code
| City: | Lyndon |
| State: | IL |
| County: | Whiteside County |
| Area Codes: | 815 |
| Latitude: | 41.71 |
| Longitude: | -89.92 |
| Time Zone: | America/Chicago |
| Population in 2010: | 975 |
| School District: | Prophetstown-Lyndon-Tampico Community Unit School District 3 |
| District Code: | 32830 |