- Jack Russell terrier
- jacks
- jackscrew
- jackshaft
- jack shit
- jacks-in-the-box
- jacksnipe
- jacksnipes
- jacks-of-all-trades
- Jackson
- Jackson Community College
- Jackson Hole
- Jacksonian
- Jacksonians
- Jackson State Community College
- Jackson State University
- Jacksonville
- Jacksonville Beach
- Jacksonville College
- Jacksonville State University
- Jacksonville University
- jackstay
- jackstone
- jackstraw
- jackstraws