States Bordering Illinois: The Six Neighbors

Illinois shares borders with six states (and Lake Michigan / international water boundary with Michigan).

Bordering States

Notes

  • Illinois' only natural borders: Ohio River (KY), Mississippi River (MO, IA), Lake Michigan (MI)
  • Wisconsin & Indiana borders are surveyed lines (not rivers)
  • Quad Cities (IL/IA) and Metro East (IL/MO) are major cross-border metros
  • Chicago lakefront = de facto Michigan "border" experience
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StateDirectionBorder TypeLengthMajor Crossings
WisconsinNorthLand (42°30' N parallel)~150 miI-94, I-90, US-41, US-12
IndianaEastLand (meridian)~160 miI-94, I-90, I-80, I-74, I-70, US-41, US-30
KentuckySoutheast / SouthRiver (Ohio River)~130 miI-24, US-45, US-60, US-62, Shawneetown Bridge
MissouriWest / SouthwestRiver (Mississippi River)~350 miI-55, I-64, I-70, US-40, US-60, US-61, US-67, Clark, Poplar St, MLK, Stan Musial bridges
IowaNorthwestRiver (Mississippi River)~180 miI-80, I-74, US-6, US-30, US-61, US-67, US-150, Centennial, Rock Island, Savanna-Sabula bridges
MichiganNortheastWater (Lake Michigan)~60 mi (water)Lake Michigan car ferry: Ludington (MI) ↔ Manitowoc (WI) — not direct to IL