Lewis Armstrong Yeager, first name sometimes spelled Louis (September 10, 1878 – December 10, 1906) was an American football coach.
He served as the seventh head football coach at West Virginia University in Morgantown, West Virginia and he held that position for three seasons, in 1899 and from 1901 to 1902.
His coaching record at West Virginia was 12–9.Yeager died suddenly in 1906 of heart disease.
He is interred at Oak Grove Cemetery in Morgantown.