Kelly Walsh High School is a public secondary institution (grades 9-12) located in Casper, Wyoming, United States.

During the 2003–04 school year, Kelly Walsh began offering classes for students in the ninth grade.

Kelly Walsh High School partially reopened for classes during the fall of 1990 and it opened completely after the Christmas break in January 1991.

More recently, the Kelly Walsh 4A Girls golf team won the local Tin Cup in 2016, 2017, and 2018 while their boys placed first in 2017, 2018, and 2019.

[4] Kelly Walsh is notorious for their high budget winter theater productions such as Into The Woods or Newsies