Indiana is a borough in and the county seat of Indiana County, Pennsylvania, United States. The population was 14,895 at the 2000 census.
The borough and the region as a whole promotes itself as the "Christmas Tree Capital of the World" because the national Christmas Tree Grower's Association was founded there. There are still a large number of Christmas tree farms in the area. The largest employer in the borough today is Indiana University of Pennsylvania, the largest of 14 PASSHE schools in the state.
For decades the major industry of the town was coal mining, but as mines closed throughout the latter half of the twentieth century the area has had ongoing economic difficulty. Natural gas surveying and production have picked up some of the slack, and Indiana serves as the home of the largest privately owned drilling company in the United States, S.W. Jack Drilling Company. It also counts a number of other production and service firms as members of the community, as well as three publicly traded companies: S&T Bancorp, Inc., First Commonwealth Financial Corporation, and Superior Well Services Inc.- unique considering the size of the community. In addition it holds one of the nation's largest independent insurance agencies: The Reschini Group - which was started by the nation's first female insurance agent Rose Reschini in 1938.