Map of Howard County
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Howard County has a total area of 471 square miles (1,219 square km), of which 466 square miles (1206 square km) is land and 5 square miles (12 square km) is water.

It is bordered by the counties of Chariton County (northwest), Randolph County (northeast), Boone County (southeast), Cooper County (south), and Saline County (west).

There are 6 major highways in Howard County Missouri. They are: U.S. Route 40, Route 3, Route 5, Route 87, Route 124, Route 240.