| Official Name: | Harlan Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Fayette |
| Area Total Km2: | 95.28 |
| Area Land Km2: | 95.22 |
| Area Water Km2: | 0.07 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 36.79 |
| Area Land Sq Mi: | 36.76 |
| Area Water Sq Mi: | 0.03 |
| Area Water Percent: | 0.07 |
| Population As Of: | 2010 |
| Population Total: | 871 |
| Population Density Km2: | auto |
| Elevation M: | 349 |
| Elevation Ft: | 1145 |
| Coordinates: | 42.7808°N -91.9125°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 50655, 50662, 50681, 52142, 52164 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0468005 |
Harlan Township is one of twenty townships in Fayette County, Iowa. As of the 2010 census, its population was 871.[1]
According to the United States Census Bureau, Harlan Township covers an area of 36.79 square miles (95.28 square kilometers); of this, 36.76 square miles (95.22 square kilometers, 99.94 percent) is land and 0.03 square miles (0.07 square kilometers, 0.07 percent) is water.
The township contains these two cemeteries: Hope and Long Grove.