Nelson Stuart Smith (1888-1941) was a provincial level politician from Alberta, Canada.

He served as a member of the Legislative Assembly of Alberta representing the Olds electoral district from 1921 to 1930.

He defeated incumbent Liberal Agriculture Minister Duncan Marshall to win his first term in the Legislature.

Smith ran for re-election in the 1926 Alberta general election.

Walkley in a three-way race, largely holding his percentage of vote from the previous election.