Walter Lyon (April 27, 1853 – March 21, 1933) was an American lawyer and politician who served as the sixth lieutenant governor of Pennsylvania as a Republican from 1895 to 1899.

He was educated at the Wakeam Academy and was admitted to the bar as an attorney in 1876.

He resigned from this position in 1893 to run for Pennsylvania State Senate; he served in this body for one term until his election as Lieutenant Governor.

After leaving politics, he founded the Pittsburgh law firm of Lyon, Hunter & Burke.

This article about a member of the Pennsylvania State Senate is a stub.