Lycoming may refer to the following, all of which are at least partly in Lycoming County, Pennsylvania in the United States:
- Lycoming Engines, a manufacturer of aircraft engines, and its successor Textron Lycoming
- Lycoming engine, automobile or tank engines made by the above firm
- Lycoming College, a small, private, liberal arts college in Williamsport, Pennsylvania
- Lycoming County, Pennsylvania, or two of its current townships
- Lycoming Township, Lycoming County, Pennsylvania
- Old Lycoming Township, Lycoming County, Pennsylvania
- Lycoming Creek, a tributary of the West Branch Susquehanna River
- Lycoming Valley Railroad, a shortline railroad along the West Branch Susquehanna River