INDIANA COUNTY NUMBERS AND NAMES. The oldest counties are generally located in the south, near the Ohio River, while the newer ones are in the north, in territory acquired later. This is a list of Indiana counties and county seats in alphabetical order along with their population, areas and date of formation. Many Indiana counties are named after the founding fathers of the United States and the personalities of the American Revolutionary War, the War of 1812 and the Battle of Tippecanoe; the first leaders of the territory of Indiana and Indiana, as well as of surrounding states such as Michigan and Kentucky; in addition to tribes native American and geographical features.
Explore the Indiana County map, the list of all counties along with their county seats in alphabetical order and their population, areas and date of formation. According to the 2000 United States Census, the population of Indiana was 6,045,485, the average population of Indiana's 92 counties is 65,712, with Marion County the most populous (860, 45) and Ohio County (5, 62) the least populated. The following is an alphabetical list of Indiana's counties, their county seats, the date they were founded, and the origin of the county's name.
