Casey (pronounced KAY-zee[5]) is a city in Clark and Cumberland counties in the U.S. state of Illinois.

The Cumberland County portion of Casey is part of the Charleston–Mattoon Micropolitan Statistical Area.

Casey is the home to several Guinness World Record constructions - super-sized items in the form of outdoor sculptures—including the Wind Chime, Rocking Chair, Knitting Needles, Crochet Hook, Pitchfork, Golf Tee, Yardstick, Wooden Token, Dutch Wooden Shoes, Mailbox, Pencil and Birdcage.

[6] According to the 2021 census gazetteer files, Casey has a total area of 2.26 square miles (5.85 km2), all land.

28.49% of all households were made up of individuals, and 13.70% had someone living alone who was 65 years of age or older.