| Official Name: | Colerain Township, Belmont 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: | Belmont |
| Unit Pref: | Imperial |
| Area Total Km2: | 64.7 |
| Area Land Km2: | 64.3 |
| Area Water Km2: | 0.4 |
| Population As Of: | 2020 |
| Population Total: | 4174 |
| Population Density Km2: | auto |
| Population Density Sq Mi: | auto |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Footnotes: | [1] |
| Elevation M: | 338 |
| Elevation Ft: | 1109 |
| Coordinates: | 40.115°N -80.8328°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 43916 |
| Area Code: | 740 |
| Blank Name: | FIPS code |
| Blank Info: | 39-16602[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1085776 |
Colerain Township is one of the sixteen townships of Belmont County, Ohio, United States. As of the 2020 census the population was 4,174.[3]
Located in the northeastern part of the county, it borders the following townships:
No municipalities are located in Colerain Township, although three unincorporated communities are located in the township:
Portions of the unincorporated communities of Blaine and Lansing (a census-designated place) extend into Colerain Township.
Colerain Township was organized in 1808. It was named from Coleraine, in Northern Ireland.[4]
Statewide, other Colerain Townships are located in Hamilton and Ross counties.
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,[5] 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.