Happy Jack

• Eskimo
• Greeley County, Nebraska
• Happy Jack (album)
• Happy Jack (song)
• Happy Jack Chalk Mine (Greeley County, Nebraska)
• Happy Jack Peak
• Happy Jack, Arizona
• Happy Jack, Louisiana
• Jack M. Ilfrey
• John Godber
• John Scaddan
• John Wilton (general)
• Monticello, Utah
• Scotia, Nebraska
• Smilin' Jack (disambiguation)
• Southern Rocky Mountains
• Thornton Burgess
• Wyoming Highway 210