Arminto is an unincorporated community in northwestern Natrona County, Wyoming, United States.

[2] Arminto was built as a stop on the Chicago, Burlington and Quincy Railroad, and was named for Manuel Armenta who started the nearby Jack Pot Ranch.

[4] Arminto voted to incorporate in 1915; unincorporated towns could not sell liquor in Wyoming at the time.

[6] The Big Horn Hotel was moved from Wolton to Arminto in 1913 when the railroad arrived there.

It was entered on the National Register of Historic Places in 1978, and was destroyed by a fire in 1985.