Clinton Township, Seneca County, Ohio

Seneca County is a county located in the northwestern part of the U.S. state of Ohio. As of the 2020 census, the population was 55,069. Its county seat is Tiffin. The county was created in 1820 and organized in 1824. It is named for the Seneca Indians, the westernmost nation of the Iroquois Confederacy. This people were based in present-day New York but had territory extending into Pennsylvania and Ohio.Seneca County comprises the Tiffin, OH Micropolitan Statistical Area, which is also included in the Findlay–Tiffin, OH Combined Statistical Area.

Heidelberg University is a private university in Tiffin, Ohio. Founded in 1850, it was known as Heidelberg College until 1889 and from 1926 to 2009. It is affiliated with the United Church of Christ.

Aigler Alumni Building, formerly the College Hill School, is a historic building in Tiffin, Ohio, that was listed in the National Register on February 12, 1979. It is one of ten buildings on the Heidelberg University campus listed on the National Register of Historic Places.

The Black Student Union Center of Heidelberg College in Tiffin, Ohio, located at 120 Hedges St., was built in 1920. It was listed on the National Register of Historic Places in 1979.At the time of writing of the Heidelberg College Multiple Resources Assessment, the union was not considered to be NRHP-eligible.

The Octagon is a historic octagon house on the campus of Heidelberg University in Tiffin, Ohio, United States. Built in the mid-19th century, it has been used for residential purposes throughout its history, and while it has experienced over a century of gradual deterioration, it has been named a historic site, and the 21st century has seen plans to restore it to its original integrity. The Octagon was constructed in 1852, and other than Founders Hall, it was the first building constructed on Heidelberg's campus. Constructed along with the President's House and the Gerhart-Rust Residence, it was, like the others, intended to be used as faculty housing. Its builder and earliest resident was polymath Jeremiah Good, the college's professor of mathematics and also the man responsible for designing Founders Hall. During and after Good's lifetime, he and his family owned the house; since that time, it has passed through a succession of owners, most of whom have been connected to the college in some way. Little upkeep has been performed on the house for many years, permitting it to fall into disrepair; already by 1910 it had been subdivided into a pair of apartments, and during the 1960s it was rented by the college and used as a student dormitory. The university finally purchased the house in 2007, after a wealthy man from New Bremen gave a large sum of money to the institution. Since that time, students, faculty, and administrators have discussed the proper method of using the Octagon; a class of students studying concepts of space and place conducted a small informal archaeological excavation, finding nothing substantial, while officials have debated restoring the property.Built of brick on a stone foundation, the two-story house features a second-story window on each side, while the first story segments are occupied either by a door or a window. A wrap-around porch surrounds several of the sides, but it does not continue to the house's rear. The house is covered with a hip roof that rises only a small distance from the edges to the center; it is made of tin.In 1979, the Octagon was listed on the National Register of Historic Places, qualifying because of its historically significant architecture. It was one of twelve buildings on the campus added to the Register at the same time, all as part of a multiple property submission known as the "Heidelberg College Multiple Resource Area".

Calvert High School is a private, Catholic high school in Tiffin, Ohio. It is part of the Roman Catholic Diocese of Toledo. Athletic teams are known as the Senecas.

WSJG-LP ("St. John Paul The Great Radio") is a non-commercial low-power FM broadcasting station at 103.3 MHz in Tiffin, Ohio. It is the seventh Catholic station in the Toledo Diocese and is named in honor of Pope John Paul II who is now a canonized saint.

Tiffin is a city in and the county seat of Seneca County, Ohio, United States. Developed along the Sandusky River, Tiffin is located about 55 miles (89 km) southeast of Toledo. The population was 17,953 at the 2020 census. It is the home of Heidelberg University and Tiffin University. At one time the city was noted as a glass and porcelain manufacturing center. The National Arbor Day Foundation has designated Tiffin as a Tree City USA.

Columbian High School is a comprehensive public high school in Tiffin, Ohio, United States. It is the only public high school in the Tiffin City School District. Their nickname is the Tornadoes. A long time member of the Northern Ohio League (1954-2017), Tiffin Columbian joined the Sandusky Bay Conference in 2017. The school has 850 students. The school was founded in 1859 and the current building was constructed in 1959. The building was named for the 1893 World's Columbian Exposition, the world's fair that celebrated the 400th anniversary of Christopher Columbus' arrival to the New World. David Alvarado is the principal at the school. Greg DeVore is the assistant principal. Columbian's Frost-Kalnow Stadium is a 4,500 seat facility that is used by Columbian and Tiffin University.

Tiffin University is a private university in Tiffin, Ohio. It was founded in 1888 and is accredited by the Higher Learning Commission. The university offers undergraduate and graduate degree programs at the main campus in Tiffin, Ohio; the University of Bucharest in Romania; and several locations in Ohio, including the Cleveland, Toledo, and Fremont areas, as well as online.

Bagby–Hossler House is a historic house in Tiffin, Ohio.

Swander is an unincorporated community in Seneca County, in the U.S. state of Ohio.