Illmo is a former community and neighborhood of Scott City, Missouri.
Illmo had its start in 1905 with construction of the nearby Thebes Bridge which connects Illinois and Missouri. The name Illmo is a contraction of Illinois and Missouri. A post office called Illmo was established in 1904, and remained in operation until 1982. Illmo was annexed by Scott City in 1980.
Illmo, Scott City, Missouri Facts for Kids. Kiddle Encyclopedia.