Columbia-Tusculum is one of the 52 neighborhoods of Cincinnati, Ohio. Founded in 1788 and annexed in 1871, it is the city's oldest neighborhood. The population was 1,523 at the 2020 census. Columbia was founded in 1788 on the Little Miami River and predates Losantiville by a month. The first Protestant church in the Northwest Territory was erected in Colu…Columbia-Tusculum is one of the 52 neighborhoods of Cincinnati, Ohio. Founded in 1788 and annexed in 1871, it is the city's oldest neighborhood. The population was 1,523 at the 2020 census. Columbia was founded in 1788 on the Little Miami River and predates Losantiville by a month. The first Protestant church in the Northwest Territory was erected in Columbia. The Cincinnati area's first school opened here in 1790. Many of the early settlers are buried in the former Columbia Baptist Cemetery, founded in 1790. The cemetery is now known as the Pioneer Memorial Cemetery.