The antipode of Illinois is the point on Earth diametrically opposite its centroid. The state's centroid is at -40.1662°, 90.8522°, and its antipodal point is at coordinates 40.1662°, -89.1478°.
An antipode is the point on Earth's surface that is diametrically opposite to a given location. For Illinois, with a centroid at coordinates -40.1662°, 90.8522°, the antipodal point is at 40.1662°, -89.1478°.
To find the antipode of any location:
Over 70% of the Earth's surface is water, and the contiguous United States lies entirely in the Northern Hemisphere. The antipodal points for most U.S. states fall in the Southern Hemisphere's vast Indian Ocean. Only Alaska and Hawaii have small land overlaps with Antarctica, Africa, and French Southern territories.
Curious about other states? Check out our complete list of U.S. state and territory antipodes. Or use the Antipode Finder to search any location on Earth.