Ralls County is a county located in the northeastern portion of the U.S. state of Missouri. As of the 2020 census, the population was 10,355. Its county seat is New London. The county was organized November 16, 1820, and named for Daniel Ralls, Missouri state legislator.
Ralls County Courthouse in New London
Hannibal is a city along the Mississippi River in Marion and Ralls counties in the U.S. state of Missouri. According to the 2020 U.S. Census, the population was 17,312, making it the largest city in Marion County. The bulk of the city is in Marion County, with a tiny sliver in the south extending into Ralls County.
Mark Twain's boyhood home in Hannibal
Tom Sawyer and Huck Finn at the Foot of Cardiff Hill (1926), by Frederick Hibbard
The Mississippi River at Hannibal
The view from Lover's Leap of Hannibal and the Mississippi River