Nelson Zwinglius Graves (August 10, 1880 – March 31, 1918) was an American cricketer, active in the late 19th and early 20th centuries. Graves was one of the Philadelphian cricketers that played from the end of the 19th century through the early years of the next. He played a total of 34 first-class matches. After graduating from the University of Pennsylvania, Graves entered his father's varnish business, N. Z. Graves Inc., where at his death he was the head of purchasing and managed a factory. Graves died of meningitis in Germantown, Pennsylvania on March 31, 1918 at the age of 37.