Whitley County is a rural county in the U.S. state of Indiana. As of the 2020 United States census, the population was 36,825. Whitley County is the 49th largest county in Indiana. The county seat 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.

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.