Sullivan County is a county located in the northern portion of the U.S. state of Missouri. As of the 2020 census, the population was 5,999. Its county seat is Milan. The county was organized February 14, 1845, and named for Major General John Sullivan of the American Revolutionary War.

From Wikipedia (CC BY-SA 4.0).

Also known as Sullivan County, Missouri, Sullivan County, MO

Key facts

Country: United States
Inception: February 14, 1845

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Overview

From Wikipedia (CC BY-SA 4.0).