Onarga Township is one of twenty-six townships in Iroquois County, Illinois, United States. As of the 2010 census, its population was 1,683 and it contained 647 housing units. Geography According to the 2010 census, the township has a total area of , of which (or 99.96%) is land and (or 0.04%) is water. Cities, towns, villages Onarga Unincorporated towns Delrey at (This list is based on USGS data and may include former settlements.) Cemeteries The township contains Onarga Cemetery. Major highways Interstate 57 U.S. Route 45 Illinois Route 54 Demographics School districts Crescent Iroquois Community Unit School District 249 Iroquois West Community Unit School District 10 Political districts Illinois' 15th congressional district State House District 105 State Senate District 53 References United States Census Bureau 2007 TIGER/Line Shapefiles United States National Atlas External links City-Data.com Illinois State Archives Townships in Iroquois County, Illinois Townships in Illinois