Johnsville

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