Thomas R. Marshall House

Columbia City Historic District is a national historic district located at Columbia City, Whitley County, Indiana. The district encompasses 197 contributing buildings in the central business district and surrounding residential sections of Columbia City. It developed between about 1840 and 1937 and includes representative examples of Greek Revival, Italianate, Queen Anne, Second Empire, Classical Revival, and Bungalow / American Craftsman style architecture. Located in the district is the separately listed Whitley County Courthouse. Other notable contributing buildings include the former Whitley County Courthouse (1841), Adams Y. Hooper Residence (c. 1860), Thomas Shorb Residence (c. 1875), William McNagny Residence (c. 1880), Elisha L. McLallen House (1905), Whitley County Jail (1875), City Hall (1917), Peabody (Carnegie) Library (1919), U.S. Post Office (1935), Central Building (1872), D.B. Clugston Block (1889), Masonic Temple (1904), Church of the Brethren (1889), Presbyterian Church (1892), Methodist Church (1912), and Baptist Church (1917).It was listed on the National Register of Historic Places in 1987.

The Whitley County Courthouse is an historic courthouse building located at Van Buren and Main Streets in Columbia City, Indiana, the seat of Whitley County. It was constructed in 1888, and is a three-story, cruciform plan, French Renaissance style Indiana limestone building designed by Brentwood S. Tolan. It has a slate roof and galvanized iron central dome.The courthouse was added to the National Register of Historic Places on February 16, 1979.

Columbia City is a city in Columbia Township, Whitley County, in the U.S. state of Indiana. The population was 9,892 at the 2020 Census, up from 8,750 at the 2010 Census, estimated to be 10,064 in 2023. The city is the county seat of Whitley County, and is the largest community therein. It is part of the Fort Wayne MSA.

Columbia City High School is a public high school located in Columbia City, Indiana.

Whitley County is a rural county in the U.S. state of Indiana. As of the 2020 United States census, the population was 34,191. Whitley County is the 49th largest county in Indiana. The county seat (and only incorporated city) is Columbia City. The county has the highest county number (92) on Indiana license plates, as it is alphabetically the last in the state's list of counties. It is part of the Fort Wayne Metropolitan Statistical Area and the Fort Wayne–Huntington–Auburn Combined Statistical Area.

Five Points is an unincorporated community in Thorncreek Township, Whitley County, in the U.S. state of Indiana.

Columbia Township is one of the nine townships within Whitley County, Indiana, United States. As of the 2010 census, the township's population was recorded at 11,047 individuals, with a total of 4,799 housing units within its boundaries.

Thorncreek Township is one of nine townships in Whitley County, Indiana, United States. As of the 2010 census, its population was 4,166 and it contained 1,894 housing units.The township has two main population clusters. The southern edge of the township consists of the unincorporated northern suburban developments of Columbia City, and in the extreme northeastern part of the township there is the unincorporated settlement and census-designated place known as Tri-Lakes.

Peabody is an unincorporated community in Washington Township, Whitley County, in the U.S. state of Indiana.

Cresco is an unincorporated community in Thorncreek Township, Whitley County, in the U.S. state of Indiana.

Lorane is an unincorporated community in Etna-Troy Township, Whitley County, in the U.S. state of Indiana.

Raber is an unincorporated community in Jefferson Township, Whitley County, in the U.S. state of Indiana.