Charles C.P. Arndt (October 31, 1811 – February 11, 1842) was an American Whig legislator from Pennsylvania and Wisconsin Territory.
Born in Wilkes-Barre, Pennsylvania, he came with his parents to Green Bay, Michigan Territory. Arndt graduated from Rutgers College, studied law in Easton, Pennsylvania and was admitted to the bar. In 1836, Arndt moved back to Green Bay and was admitted to the bar in Michigan Territory. Arndt was elected to the Wisconsin Territorial Council from Green Bay. On February 11, 1842, after a heated discussion with James Russell Vineyard, Arndt was shot to death in the council room. Vineyard was later tried for the murder and was acquitted.
In 1842, British author Charles Dickens wrote about the tragedy in his book American Notes.