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| 2015 Class 1A Sectional Assignments |  
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| Sectional A @ Westmont High School, Westmont
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| Host: Clarendon Hills Notre Dame Date: Saturday, October 10, 2015
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| Aurora Christian Clarendon Hills Notre Dame
 Dixon St. Mary's   
 (Coop)
 Downers Grove St. Mary
 Elgin Harvest Christian
 Geneva St. Peter
 Hampshire St. Charles Borromeo
 La Grange St. Francis
 Lisle St. Joan of Arc
 Markham Obama
 Plano St. Mary's
 Rockford Galapagos
 Rockford Keith   
 (Boys Only)
 Sycamore St. Mary's
 Woodridge St. Scholastica   
 (Coop)
 (Boys Only)
 
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| Sectional B @ Deer Grove East, Forest Preserve (Shelter 2), Palatine
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| Host: Buffalo Grove St. Mary Date: Saturday, October 10, 2015
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| Antioch Emmons   
 (Boys Only) Arlington Heights Our Lady of the Wayside
 Arlington Heights St. James
 Barrington St. Anne
 Buffalo Grove St. Mary
 Fox River Grove
 Grayslake St. Gilbert
 Hoffman Estates St. Hubert
 Inverness Holy Family
 Lake Zurich St. Francis deSales
 Palatine Quest
 Palatine St. Theresa
 Palatine St. Thomas
 
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| Sectional C @ Busse Woods, Schaumburg
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| Host: Mt. Prospect St. Emily Date: Saturday, October 10, 2015
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| Chicago Old St. Mary's Chicago Our Lady of Mt. Carmel Academy
 Chicago Queen of All Saints
 Chicago Queen of Angels
 Chicago St. Andrew
 Chicago St. Benedict
 Chicago St. Clement
 Chicago St. Eugene
 Chicago St. Josaphat
 Mt. Prospect St. Emily
 Mt. Prospect St. Raymond
 River Forest St. Luke
 Wilmette St. Francis   
 (Boys Only)
 
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| Sectional D @ Kankakee Community College, Kankakee
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| Host: Bourbonnais Maternity BVM Date: Saturday, October 10, 2015
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| Bourbonnais Maternity BVM Bourbonnais St. George
 Bourbonnais St. Paul's
 Crescent City   
 (Coop)
 Joliet St. Paul
 Joliet St. Raymond
 Kankakee Aquinas
 Ladd   
 (Boys Only)
 Onarga Iroquois West
 Orland Hills Bernardin
 Ottawa Marquette
 Seneca
 South Chicago Heights Cornerstone
 
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| IESA Cross-Country 2015 Class 1A Sectional Assignments |  | 
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| Sectional E @ Donovan Park (formally Donovan Golf Course), Peoria
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| Host: Peoria Heights St. Thomas Date: Saturday, October 10, 2015
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| Brimfield Chillicothe St. Edward's
 Colona
 East Moline Northeast
 Elmwood
 Morton Blessed Sacrament
 Mossville
 Peoria Academy
 Peoria Heights St. Thomas
 Peoria St. Jude   
 (Boys Only)
 Peoria St. Philomena
 Peoria St. Vincent de Paul
 Princeville
 Spring Bay Riverview
 Washington St. Patrick
 
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| Sectional F @ Liberty Uhland Acres, Liberty
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| Host: Liberty Date: Saturday, October 10, 2015
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| Bushnell-Prairie City Carrollton GS   
 (Coop)
 Carthage
 Dallas City   
 (Coop)
 Franklin   
 (Coop)
 Jacksonville Our Saviour
 Lewistown Central
 Liberty
 Mendon Unity
 Quincy Blessed Sacrament
 Springfield Christ the King   
 (Coop)
 Springfield Christian
 White Hall North Greene
 
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| Sectional G @ Mason City Illini Central
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| Host: Mason City Illini Central Date: Saturday, October 10, 2015
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| Bloomington Corpus Christi Bloomington St. Mary's
 Decatur Dennis
 Decatur Garfield Montessori
 Decatur Hope
 Decatur Johns Hill
 Decatur Our Lady of Lourdes   
 (Coop)
 Decatur Robertson
 Delavan
 Mason City Illini Central
 Normal Epiphany
 Pekin St. Joseph
 South Pekin   
 (Coop)
 Tremont
 Warrensburg-Latham
 
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| Sectional H @ The High School of St. Thomas More, Champaign
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| Host: Champaign St. Matthew Date: Saturday, October 10, 2015
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| Bismarck-Henning Champaign Holy Cross
 Champaign Next Generation
 Champaign St. Matthew
 Chrisman Scottland
 Cowden-Herrick   
 (Coop)
 Danville Schlarman
 Effingham St. Anthony   
 (Coop)
 Findlay Okaw Valley
 Peoria St. Mark
 Philo St. Thomas
 Rossville-Alvin
 Toledo Cumberland
 Urbana University
 
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 Class HistoryThe IESA sanctioned Cross-Country in 1979. There was one class of Cross-Country until 1997 when the activity was split into A and AA based upon enrollment. It was split in 2012 into three classes of 1A, 2A and 3A. In 2023 it was split again into the current four classes of 1A, 2A, 3A and 4A. How Class Split is Determined |