Mustla may refer to several places in Estonia:
Mustla, small borough in Viljandi Parish, Viljandi County Mustla, Järva County, village in Paide, Järva County Mustla, Pärnu County, village in Saarde Parish, Pärnu County Mustla, Saaremaa Parish, village in Saaremaa Parish, Saare County
Saue-Mustla, village in Saaremaa Parish, Saare County, known as Mustla until 2017 when located in Pihtla Parish