William Hetherington Shield (July 12, 1878 – April 15, 1939) was a Canadian provincial politician from Alberta.

He served as a member of the Legislative Assembly of Alberta from 1921 to 1935 sitting with the United Farmers caucus in government.

He stood as a United Farmers candidate in the electoral district of Macloed against incumbent George Skelding.

Shield managed to win the straight fight with a greatly improved popular vote more than tripled from the previous election sending McDonald to defeat.

[5] Shield ran for a fourth term in the 1935 Alberta general election but was defeated finishing a distant second in the three way race to Social Credit candidate James Hartley.