| Official Name: | Lostcreek Township, Miami County, Ohio |
| Settlement Type: | Township |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | County |
| Subdivision Name2: | Miami |
| Unit Pref: | Imperial |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 1606 |
| Population Density Km2: | auto |
| Population Density Sq Mi: | auto |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 40.05°N -92°W |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
Lostcreek Township is one of the twelve townships of Miami County, Ohio, United States. The 2020 census found 1,606 people in the township.
Located in the eastern part of the county, it borders the following townships:
The village of Casstown is located in southwestern Lostcreek Township.
Lostcreek Township was established in 1818, and named after Lost Creek, a tributary of the Great Miami River.[2] It is the only Lostcreek Township statewide.[3]
The township is governed by a three-member board of trustees, who are elected in November of odd-numbered years to a four-year term beginning on the following January 1. Two are elected in the year after the presidential election and one is elected in the year before it. There is also an elected township fiscal officer,[4] who serves a four-year term beginning on April 1 of the year after the election, which is held in November of the year before the presidential election. Vacancies in the fiscal officership or on the board of trustees are filled by the remaining trustees.