They voted Monday to allow those 19 and 20 years old to enter bars.
The decision comes after a back and forth on the issue, including a vote in January that raised the bar entry age in Maryville from 19 to 21 years old.
The council voted 3-0 to repeal the ordinance passed in January. The January vote followed a vote last June to keep 19 as the standard bar entry age.
The council has seen a shake up since then with a new mayor and council members.
Also Monday, the council rejected other alcohol-related ordinances proposed by the old council connected to underage drinking.