the diocese of peoria comprises the 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. aside from peoria, the illinois portions of the quad cities of illinois and iowa are also part of the peoria diocese. the st. john's catholic newman center on the campus of the university of illinois at urbana-champaign, the st. francis of assisi newman center on the campus of western illinois university, john paul ii catholic newman center on the campus of illinois state university as well as the st. joseph newman center on the campus of bradley university are part of the peoria diocese.