| Troy Mills, Iowa | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Iowa#USA |
| Pushpin Label: | Troy Mills |
| Pushpin Map Caption: | Location in Iowa##Location in the United States |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Iowa |
| Subdivision Type2: | County |
| Subdivision Name2: | Linn |
| Subdivision Type3: | Township |
| Subdivision Name3: | Spring Grove |
| Unit Pref: | Imperial |
| Population As Of: | 2000 |
| Population Total: | 248 [1] |
| Population Density Km2: | auto |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 869 |
| Coordinates: | 42.29°N -91.6825°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 52344 |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 462343[2] |
Troy Mills is an unincorporated community in northern Linn County, Iowa, United States. It lies along local roads north of the city of Cedar Rapids, the county seat of Linn County.[3] Its elevation is 869 feet (265 m). Although Troy Mills is unincorporated, it has a post office, with the ZIP code of 52344,[4] which opened on 10 June 1867, and a full volunteer fire department.
Troy Mills was laid out in 1870. A gristmill and sawmill had existed there previously.[5] Troy Mills' population was 109 in 1902.[6]
The North Linn Community School District operates area public schools.[7]