Idalia is an unincorporated town and census-designated place (CDP) in Yuma County, Colorado, United States.

[6] The Alva, Colorado, post office operated from August 6, 187, until September 18, 1888, when the name was changed to Idalia.

[6] A new Kindergarten through grade-12 school building opened in the fall of 2013 providing state-of-the-art educational programs & facilities.

Timeline Due to low enrollment of the high school, Idalia, like hundreds of schools throughout Kansas, Nebraska, Wyoming, Utah, and Texas, plays six-man football, a variation of football involving six players on each side off the ball rather than the traditional eleven.

[15] However, as the football program continues to rebuild, the Idalia girls' sports teams have had some very successful years.