Ucross is an unincorporated community along the Piney Creek on the southern edge of Sheridan County, Wyoming, United States.

[3] The community received its name from the Pratt and Ferris Cattle Company, whose logo had a U with a cross beneath it.

[4] The Ucross Art Gallery is housed in the original Pratt and Ferris headquarters, the Big Red Barn.

Walt Longmire mystery novels author Craig Johnson lives in a log cabin in Ucross.

[3] Distinguished Ucross Foundation alumni include Annie Proulx, Terry Tempest Williams, Elizabeth Gilbert, Ann Patchett, Ricky Ian Gordon, Bill Morrison, Theaster Gates, Anthony Hernandez, and Tayari Jones.