Harmony Township may refer to:

Illinois

• Harmony Township, Hancock County, Illinois

Indiana

• Harmony Township, Posey County, Indiana
• Harmony Township, Union County, Indiana

Kansas

• Harmony Township, Stevens County, Kansas, in Stevens County, Kansas

Minnesota

• Harmony Township, Minnesota

Missouri

• Harmony Township, Washington County, Missouri

New Jersey

• Harmony Township, New Jersey

North Dakota

• Harmony Township, Cass County, North Dakota, in Cass County, North Dakota

Ohio

• Harmony Township, Clark County, Ohio
• Harmony Township, Morrow County, Ohio

Pennsylvania

• Harmony Township, Beaver County, Pennsylvania
• Harmony Township, Forest County, Pennsylvania
• Harmony Township, Susquehanna County, Pennsylvania

South Dakota

• Harmony Township, Edmunds County, South Dakota, in Edmunds County, South Dakota
• Harmony Township, Jerauld County, South Dakota, in Jerauld County, South Dakota
• Harmony Township, Spink County, South Dakota, in Spink County, South Dakota