Samuel Johnston or Sam Johnston may refer to:
- Sam Johnston (Yukon politician) (born 1935), politician in the Yukon, Canada
- Sam Johnston (New Brunswick politician), politician in the New Brunswick, Canada
- Sam Johnston (wrestler) (born 1987), American professional wrestler better known as Sami Callihan
- Sammy Johnston (1967âÂÂ2025), Scottish footballer
- Samuel Johnston (1733âÂÂ1816), American lawyer and statesman
- SS Samuel Johnston, a Liberty ship
- Samuel Johnston (footballer) (1866âÂÂ1910), Irish footballer
- Samuel Johnston (Waterview) (1840âÂÂ1924), Australian pioneer
See also