Interstate 55 (I-55) is a major Interstate Highway in the central United States. As with most primary Interstates that end in a five, it is a major cross-country, north–south route, connecting the Gulf of Mexico to the Great Lakes. The highway travels from LaPlace, Louisiana, at I-10 to Chicago, Illinois, at U.S. Route 41, at McCormick Place. The major cities that I-55 connects to are New Orleans, Louisiana; Jackson, Mississippi; Memphis, Tennessee; St. Louis, Missouri; and Chicago, Illinois.

Crittenden County is a county located in the U.S. state of Arkansas. As of the 2020 census, the population was 48,163. The county seat is Marion, and the largest city is West Memphis.