Idabel, Oklahoma 
Idaho Falls, Idaho 
Illinois River, Illinois 
Independence, Missouri 
Indiana, Pennsylvania 
Indianapolis, Indiana 
Indianola, Mississippi 
Inouye, Daniel K. 
International Falls, Minnesota 
Iowa City, Iowa 
Iron Mountain, Michigan 
Ironwood, Michigan 
Irvington, New Jersey 
Ishpeming, Michigan 
Island Pond, Vermont 
Isle Royale N.P., Michigan 
Issaquah, Washington 
Ithaca, New York