Indiana residents are among the least courteous in the U.S.
The Marchex Institute analyzed more than 600,000 phone calls and ranked all 50 states based on usage of the words "please" and "thank you."
Indiana ranked third least courteous in the study, with Wisconsin and Massachusetts ranking first and second.
Tennessee ranked fourth, with Ohio in fifth place.
The most courteous states, according to the study, were South Carolina, North Carolina, Maryland, Louisiana and Georgia.
The Marchex study also examined each state's usage of curse words, finding Ohio had the most people using profanities, followed by Maryland, New Jersey, Louisiana and Illinois.
Men curse the most.
The states with the least frequency of spoken profanity were Washington, Massachusetts, Arizona, Texas and Virginia.
Ohio was the only state to make the top five in both least courteous and most cursing categories.