There are 10 US Post Offices in Tama County serving a total of 16,017 residents equating to 1,602 residents per post office. It's estimated that approximately 25,565 packages are handled across the 10 county post offices annually. Tama County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 17,767. Its county seat is Toledo. The county was formed on February 17, 1843 and named for Taimah, a leader of the Meskwaki Indians."