Cameron is a city in Clinton and DeKalb counties in the U.S. state of Missouri. The population was 9,933 at the2010 census.The Clinton County portion of Cameron is part of the Kansas City, MO–KS Metropolitan Statistical Area, while the DeKalb County portion is part of the St. Joseph, MO–KS Metropolitan Statistical Area.
In 1854 Samuel McCorkle platted the town of Somerville. When the Hannibal and St. Joseph Railroad (a line whose founders included the father of Mark Twain and which was to deliver the first mail of the Pony Express) proposed coming through the area, the line said the area around Somerville was too steep for the rail so he platted a new community 1.5 miles to the west in what is now "Olde Towne" Cameron. The town platted in 1855 was named for the maiden name of his wife Malinda Cameron. McCorkle Park is still Cameron's centerpiece park.During the 1860s as fierce competition raged for the starting point of the First Transcontinental Railroad there was competition to get the Hannibal & St. Joseph (which at the time was the farthest west railroad connected to the main rail network) to cross the Missouri River. Omaha, Nebraska was to win the fight when the Union Pacificstarted the railroad west from there. However there was no bridge connecting it to the rest of the network.