Millcreek Township, Union County, Ohio

Watkins is an unincorporated community in Mill Creek Township, Union County, Ohio, United States. It is located at 40°12′45″N 83°14′49″W, along Watkins Road, between U.S. Route 33 and U.S. Route 42, about five miles east of Marysville.

Dover Township is one of the fourteen townships of Union County, Ohio, United States. The 2020 census found 2,326 people in the township.

Ostrander ( OH-stran-dər) is a village in Delaware County, Ohio, United States. The population was 1,094 at the 2020 census.

New Dover is an unincorporated community in Dover Township, Union County, Ohio, United States. It is located at 40°14′48″N 83°18′17″W, along U.S. Route 36, about three miles east of Marysville.New Dover was originally called Dover, and under the latter name was laid out and platted in 1854. The New Dover Post Office was established on February 5, 1856. As of 1877, the village did a considerable amount of manufacturing business. It contained one church, a school-house, one harness shop, one blacksmith shop, and several other stores. The post office was discontinued on April 30, 1935. The mail service is now sent through the Marysville branch.

New California is a census-designated place in central Jerome Township, Union County, Ohio, United States. It is located at 40°09′22″N 83°14′12″W, at the intersection of U.S. Route 42 and Industrial Parkway, just south of 42's intersection with U.S. Route 33. The population was 2,225 at the 2020 census.

Dipple is an unincorporated community in Paris Township, Union County, Ohio, United States. It is located about 2 miles (3.2 km) southeast of Marysville along U.S. Route 33 where Scottslawn Road intersects with the railroad tracks, at 40°12′08″N 83°19′01″W. The location of the original community is now wholly located on the Scotts Miracle-Gro Company property.

Arnold is an unincorporated community in Jerome Township, Union County, Ohio, United States. It is located at 40°08′31″N 83°15′03″W, along U.S. Route 42, between New California and Plain City.

Jerome Township is one of the fourteen townships of Union County, Ohio, United States. The 2010 census found 7,541 people in the township.

Jerome is an unincorporated community in Jerome Township, Union County, Ohio, United States. It is located at 40°09′59″N 83°10′33″W, at the intersection of Jerome Road (Union County Road 11) and Scioto Road (Union County Road 13), about 2 miles east of New California.A former variant name of Jerome was Frankfort. Frankfort was laid out and platted in 1846. A post office called Jerome was established on April 17, 1848, but was discontinued on December 15, 1905. The mail service is now sent through the Plain City branch.

Union County Airport (ICAO: KMRT, FAA LID: MRT) is a public use airport in Union County, Ohio, United States. It is owned by the Union County Airport Authority and located one nautical mile (2 km) southeast of the central business district of Marysville, Ohio. This airport is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a general aviation facility.Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned MRT by the FAA, but has no designation from the IATA (which assigned MRT to Moroak, Northern Territory, Australia).

Bellepoint is an unincorporated community in Delaware County, in the U.S. state of Ohio.

Mill Creek is a stream in central Ohio. It is a tributary of the Scioto River. Early settlers built and operated many mills along Mill Creek, hence the name.Marysville, Ohio, is the largest settlement on Mill Creek. A USGS gauge on the creek at Bellepoint recorded a mean annual discharge of 176 cubic feet per second (5.0 m3/s) during water years 1944–2019.