Lewis Armstrong Yeager,[1] first name sometimes spelled Louis (September 10, 1878 – December 10, 1906) was an American college football player and coach and lawyer.

He was the seventh head football coach at West Virginia University in Morgantown, West Virginia, serving for two seasons, in 1899 and 1901, compiling a record of 5–5.

Yeager also played football at West Virginia as a fullback from 1896 to 1899, and was captain of the 1898 West Virginia Mountaineers football team.

He died on December 10, 1906, of heart disease, following a brief illness.

This biographical article relating to a college football coach first appointed in the 1890s is a stub.