Altha is a small town in Calhoun County, Florida state. As per 2004 records, its population was 507.
Altha is in a rural county, with the primary occupation being agriculture. Tomatoes, watermelons, green vegetables, cucumbers, peanuts, corn, wheat, and cotton are the major crops. The timber industry also popular in the area. The largest employer in Altha, and in fact one of the largest in Calhoun County, is Oglesby Plants International, employing more than 100 local citizens. The city also has a few popular fishing spots on Chipola River.