John Spencer (December 20, 1946 – December 16, 2005) was an American actor. He was most widely known for his role as White House Chief of Staff Leo McGarry on the NBC political drama series The West Wing, for which he won a Primetime Emmy Award in 2002.
Spencer died of a heart attack in a Los Angeles hospital on December 16, 2005, four days before his 59th birthday. He was survived by his partner, Patricia Mariano. At Spencer's private funeral, his West Wing castmate, Kristin Chenoweth, sang the musical number "For Good" from the Broadway musical Wicked. Spencer's remains were interred at Laurel Grove Memorial Park in his hometown of Totowa, New Jersey.
At the time of his death, Spencer had filmed two of the five West Wing episodes that were in post-production: "Running Mates" and "The Cold". Spencer's death was later written into the show's seventh and final season, in which McGarry was said to have died of a heart attack on election night. Spencer's name remained in the opening credits throughout the remainder of the show. A tribute to Spencer, read by the show's lead star, Martin Sheen, was delivered at the start of the tenth episode of the final season.