This is a list of current and former Roman Catholic churches in Vicariate I of the Roman Catholic Archdiocese of Chicago. Vicariate I covers Lake County, Illinois, and portions of northern Cook County. It includes the communities of Des Plaines, Elk Grove Village, Lake Forest, Mount Prospect, Mundelein, Schaumburg, and Waukegan. The vicariate is further subdivided into six regional areas, Deanery A through Deanery F.

Deanery A: Mundelein area NameImageLocationDescription/sourcesPrince of Peace135 S Milwaukee Ave, Lake VillaEstablished in 1955St. Bede36455 N Wilson Rd, InglesideFormed in the 1930s; combined in 2018 with St. Peter in Antioch to form Our Lady of Lakes parishSt. Francis de Sales33 S. Buesching Rd, Lake ZurichEstablished in 1948 as a missionSt. Gilbert301 E Belvidere Rd, GrayslakeDedicated in 1932St. Joseph 114 N Lincoln Ave, Round Lake Established in 1911St. Mary of the Annunciation22333 W Erhart Rd, MundeleinNational Shrine of St. Maximilian Kolbe1600 W Park Ave, LibertyvillePilgrimage site, retreat center, and community of Franciscan friarsSt. Peter557 W Lake St, AntiochParish dates to 1897; combined in 2018 with St. Bede in Ingleside to form Our Lady of the Lakes parishSt. Peter27551 Volo Village Rd, VoloBegan as a mission church in 1868St. Raphael the Archangel40000 North US Hwy 45, Old Mill CreekChurch built in 2008 using portions of two closed Chicago Catholic churches, St. John of God (a Chicago landmark designed by Henry J. Schlacks) and St. Peter Canisius.Santa Maria del Popolo116 N Lake St, MundeleinIncludes Our Lady of Siluva ShrineTransfiguration316 W Mill St, WaucondaParish celebrated 175th anniversary in 2016; masses conducted in Polish

Deanery B: Waukegan area NameImageLocationDescription/sourcesHoly Family450 Keller Ave, WaukeganPart of Most Blessed Trinity ParishImmaculate Conception508 Grand Ave, WaukeganPart of Most Blessed Trinity ParishOur Lady of Humility10655 W Wadsworth Rd, Beach ParkEstablished 1950Queen of Peace910-14th St, WaukeganPart of Most Blessed Trinity ParishSt. Anastasia624 Douglas Ave, WaukeganEstablished 1926; part of Little Flower ParishLittle Flower Catholic ParishSt. Dismas2600 Sunset Ave, WaukeganEstablished 1963; part of Little Flower ParishSt. Patrick15000 W Wadsworth Rd, WadsworthParish traces roots to 1849St. Paul the Apostle6401 Gages Lake Rd, Gurnee

Deanery C: Lake Forest area NameImageLocationDescription/sourcesHoly Cross724 Elder Ln, DeerfieldEstablished in 1929Immaculate Conception770 Deerfield Rd, Highland ParkSt. James135 North Ave, HighwoodSt. Joseph121 E Maple Ave, LibertyvilleSt. Mary175 E Illinois Rd, Lake ForestEstablished in 1844 as a mission churchSt. Mary of Vernon236 US Hwy 45, Indian CreekEstablished in 1978St. Patrick991 W Waukegan Rd, Lake ForestOldest church in Lake Forest; parish traces roots to 1839

Deanery D: Arlington Heights area NameImageLocationDescription/sourcesHoly Family2515 W Palatine Rd, InvernessEstablished in 1984Mission San Juan Diego2323 N Wilke Rd, Arlington HeightsChurch serving the area's Mexican communityOur Lady of the Wayside450 S Mitchell Ave, Arlington HeightsFounded in 1952St. Anne120 N Ela St, BarringtonOriginal church (now used as a daily mass chapel) dedicated 1884St. Collette3900 S Meadow Rd, Rolling MeadowsSt. Edna2525 N Arlington Hts Rd, Arlington HeightsSt. James820 N Arlington Hts Rd, Arlington HeightsSt. Joseph the Worker181 W Dundee Rd, WheelingEstablished in 1957St. Mary10 N Buffalo Grove Rd, Buffalo GroveOld church built in 1899 with landmark steeple now a chapel; larger church built 1978St. Theresa455 N Benton St, PalatineEstablished as a mission 1930St. Thomas of Villanova1201 E Anderson Dr, PalatineEstablished in 1961

Deanery E: Elk Grove and Schaumburg area NameImageLocationDescription/sourcesHoly Spirit1451 W Bode Rd, SchaumburgEstablished in 1974Queen of the Rosary750 W Elk Grove Blvd, Elk Grove VillageEstablished in 1959St. Alphonsus Liguori411 N Wheeling Rd, Prospect HeightsEstablished in 1956St. Ansgar2040 Laurel Ave, Hanover ParkEstablished in 1968St. Hubert729 Grand Canyon St, Hoffman EstatesEstablished in 1960, replacing "St Buggy Whip"St. John the Evangelist502 S Park Blvd, StreamwoodSt. Julian Eymard601 Biesterfield Rd, Elk Grove VillageEstablished in 1968St. Marceline822 S Springinsguth Rd, SchaumburgEstablished in 1966St. Matthew1001 E Schaumburg Rd, SchaumburgOpened doors 1975St. Peter Damian131 S Crest Ave, Bartlett

Deanery F: Des Plaines and Mount Prospect area NameImageLocationDescription/sourcesShrine of Our Lady of Guadalupe1170 N River Rd, Des PlainesEstablished in 1987St. Cecilia700 S Meier Rd, Mt. ProspectSt. Emily1400 E Central Rd, Mt. ProspectEstablished in 1960St. Mary794 Pearson St, Des PlainesEstablished as a permanent parish in 1906St. Paul Chong Hasang675 Dursey Ln, Des PlainesKorean Catholic mission named for 19th century Korean martyr Paul Chong HasangSt. Raymond de Penafort301 S I Oka Ave, Mt. ProspectEstablished in 1949St. Stephen Protomartyr1280 Prospect Ave, Des PlainesSt. Thomas Becket1321 N Burning Bush Ln, Mt. ProspectSt. Zachary567 W Algonquin Rd, Des PlainesEstablished in 1962

See also List of churches in the Roman Catholic Archdiocese of Chicago

References