Johnsville may refer to any of the following locations in the United States:
- Johnsville, Arkansas
- Johnsville, California
- Johnsville, Kentucky
- Johnsville, Maryland
- Johnsville Naval Air Development Center, officially NAWC, Aircraft Division, Warminster, a former research and development facility for the United States Navy
- Johnsville, a former place-name in New York; now East Fishkill
- Johnsville, Ohio
- Johnsville, Pennsylvania, now Warminster Township, Pennsylvania
This disambiguation page lists articles associated with the title Johnsville.
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