Millerstown may refer to:
Places
;Ireland
- Millerstown, County Westmeath, a townland in the civil parish of Killucan
;United States
- Millerstown, Kentucky
- Millerstown, Champaign County, Ohio
- Millerstown, Sandusky County, Ohio
- Millerstown, Pennsylvania, in Perry County
- Millerstown, Blair County, Pennsylvania
- Macungie, Pennsylvania, which was known as Millerstown until officially renamed in 1875