| Place Name | Cortland Township |
| Place Type | Township |
| ZIP Code(s) | 60112 60115 60151 60178 |
| County | DeKalb County |
| Area Code(s) | 815,779 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 11,155 |
| Majority Ethnicity | White 82.98% |
| Metro/Micro Stats Area | Chicago-Naperville-Elgin, IL-IN-WI |
| US Congressional District(s) | Illinois 14th |
| State House Districts | 70 |
| State Senate Districts | 35 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 82.98% |
| African American | 6.63% |
| Hispanic | 0.06% |
| Asian | 0.74% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 9.59% |