Joseph Calm Griffith Kennedy (April 1, 1813 – July 13, 1887) of Pennsylvania, was a 19th-century Whig politician, lawyer and journalist who was appointed to supervise the United States Censuses for 1850 and 1860. A prosperous farmer and journalist from a prominent Pennsylvania family, Kennedy was appointed to supervise the census operations because of his political activism in the 1848 Pennsylvania election.