Fitchburg may refer to:
Places in the United States of America
- Fitchburg, California
- Fitchburg, Kentucky
- Fitchburg, Massachusetts
- Fitchburg, Michigan
- Fitchburg, Wisconsin
Transportation
- Fitchburg Railroad, a former railroad in Massachusetts
- Fitchburg Line, a rail service using part of the former railroad
- Fitchburg station, a railroad station in Fitchburg, Massachusetts
- Fitchburg station (California), a former railroad station