Resident Population of Municipalities by County 1980, 1990 & 2000.
Driving distance from Huntsville, AL to Decatur, AL. The total driving distance from Huntsville, AL to Decatur, AL is 26 miles or 42 kilometers. Your trip begins in Huntsville, Alabama. It ends in Decatur, Alabama.
The incomplete I-22 from Memphis, Tennessee is expected to intersect there with the most expensive interchange in Alabama history, consisting of approximately 14 bridges. The interstate then continues 98 miles (158 km) in the general direction of Huntsville, passing the city of Cullman on the way.