Center Township, Mercer County, Ohio

Neptune is an unincorporated community in Mercer County, in the U.S. state of Ohio.

Celina Senior High School is a public high school located in Celina, Ohio, United States. It is the only high school in the city. Their mascot is a bulldog. They are members of the Western Buckeye League. The average enrollment is around 1,100 students.

The Grand Lake St. Marys Lighthouse, also known as the "Northwoods Lighthouse", is a historic lighthouse on Grand Lake St. Marys, a reservoir in the far western part of the U.S. state of Ohio. Located east of the city of Celina in Mercer County, the lighthouse was built in 1923, using a plan modeled after the Eddystone Lighthouse off the coast of Cornwall in the United Kingdom.

Grand Lake St. Marys State Park is a public recreation area located on 13,500-acre (5,500 ha) Grand Lake in Mercer and Auglaize counties, Ohio. Grand Lake is the largest inland lake in Ohio in terms of area, but is shallow, with an average depth of only 5–7 feet (1.5–2.1 m). The state park is open for year-round recreation, including boating, fishing, swimming and hunting. The park consists of the lake and park facilities scattered all around the shore intermingled with private property and a facility operated by Wright State University. It is west of St. Marys, and southeast of Celina, 23 miles (37 km) southwest of Lima in the northwestern part of the state.

Celina ( sə-LY-nə) is a city in and the county seat of Mercer County, Ohio, United States about 58 miles (93 km) northwest of Dayton. The population was 10,935 at the 2020 census. Celina is situated on the northwestern shores of Grand Lake St. Marys.

Immaculate Conception Catholic Church is a parish of the Roman Catholic Church in Celina, Ohio, United States. Founded later than many other Catholic parishes in the heavily Catholic region of western Ohio, it owns a complex of buildings constructed in the early 20th century that have been designated historic sites because of their architecture. Leading among them is its massive church, built in the Romanesque Revival style just 43 years after the first Catholic moved into the city: it has been called northwestern Ohio's grandest church building.

Jefferson Township is one of the fourteen townships of Mercer County, Ohio, United States. The 2020 census found 13,802 people in the township.

WCSM is an American AM radio station in Celina, Ohio, broadcasting at 1350 kHz on the AM dial. The station is owned with 96.7 WCSM-FM by Brent and Danielle Selhorst, through licensee Buzzards Media, LLC, and also broadcasts on FM translator W262DC at 100.3 MHz, also located in Celina. The station airs a country music format branded as Lake 100.3.

Hopewell Township is one of the fourteen townships of Mercer County, Ohio, United States. The 2020 census found 1,024 people in the township.

Villa Nova is an unincorporated community in Saint Marys Township, Auglaize County, Ohio, United States. It is located just west of Saint Marys on the northeastern corner of Grand Lake at the intersection of Ohio State Route 703 (Celina Road) and Ohio State Route 364 (Park Road), at 40°32′43″N 84°25′29″W.

Noble Township is one of the fourteen townships of Auglaize County, Ohio, United States. The 2020 census found 1,863 people in the township.

Franklin Township is one of the fourteen townships of Mercer County, Ohio, United States. The 2020 census found 2,511 people in the township.