Sam Johnston
Samuel Johnston or Sam Johnston may refer to:
- Sam Johnston (Yukon politician), politician in the Yukon, Canada
- Sam Johnston (New Brunswick politician), politician in the New Brunswick, Canada
- Sam Johnston (wrestler), American professional wrestler better known as Sami Callihan
- Sammy Johnston, Scottish footballer
- Samuel Johnston, American lawyer and statesman
- * SS Samuel Johnston, a Liberty ship
- Samuel Johnston (footballer), Irish footballer
- Samuel Johnston (Waterview), Australian pioneer