Wikimedia Commons has media related to Roman Catholic Diocese of Peoria.
The Roman Catholic Diocese of Peoria is the ecclesiastical territory of Roman Catholicism in the Illinois counties of Bureau, Champaign, DeWitt, Fulton, Hancock, Henderson, Henry, Knox, LaSalle, Livingston, Logan, Marshall, Mason, McDonough, McLean, Mercer, Peoria, Piatt, Putnam, Rock Island, Schuyler, Stark, Tazewell, Vermilion, Warren and Woodford. This territory touches the Illinois borders on the east and west, and includes everything in Bloomington, Champaign, Peoria, and the Illinois part of the Quad Cities.