Peter Pace (born November 5, 1945) is a retired United States Marine Corps general who served as the 16th chairman of the Joint Chiefs of Staff. Pace was the first Marine officer appointed as chairman and the first Marine officer to be appointed to three different four-star assignments; the others were as the sixth vice chairman of the Joint Chiefs of Staff from October 1, 2001, to August 12, 2005, and as Commander-in-Chief, U.S. Southern Command from September 8, 2000, to September 30, 2001. Appointed chairman by President George W. Bush, Pace succeeded U.S. Air Force General Richard Myers on September 30, 2005.

Secretary of Defense Robert Gates announced on June 8, 2007, that he would advise the President to not renominate Pace for a second term. Pace retired from the Marine Corps and stepped down as chairman on October 1, 2007. He was replaced by Chief of Naval Operations Admiral Michael Mullen.

Pace was born on November 5, 1945, in New York City's Brooklyn to Italian parents from Noci and raised in Teaneck, New Jersey, graduating from Teaneck High School in 1963.

He entered the United States Naval Academy as a midshipman in 1963. He earned a varsity letter in soccer and graduated on 7 June 1967 with a degree in mechanical engineering. Upon graduation, Pace received his commission as a second lieutenant in the Marine Corps. His choice to become a Marine was influenced, in part, by his older brother Simone, who graduated from the Academy two years ahead of him and became a Marine. (His brother saw combat in Vietnam, where he earned a Silver Star and a Purple Heart.)

He also holds a Master of Business Administration degree from George Washington University. Pace currently resides in Charlotte, North Carolina; he is married to Lynne Pace, whom he met as a midshipman. They have a son, also named Peter, and a daughter, Tiffany. Pace is a Roman Catholic.

Upon completion of The Basic School at Marine Corps Base Quantico, Virginia, in 1968, Pace was assigned to the 2nd Battalion, 5th Marines, 1st Marine Division in the Republic of Vietnam, serving first as Platoon Leader of Golf Company's Second Platoon and subsequently as assistant Operations Officer.

Returning from overseas in March 1969, he reported to Marine Barracks, Washington, D.C. During this tour, he served as head of the Infantry Writer Unit, Marine Corps Institute; platoon leader, Guard Company; security detachment commander, Camp David; White House social aide; and platoon leader, Special Ceremonial Platoon. He was promoted to captain in April 1971. In September 1971, Pace attended the Infantry Officers' Advanced Course at Fort Benning, Georgia. Returning overseas in October 1972, he was assigned to the Security Element, Marine Aircraft Group 15, 1st Marine Aircraft Wing, Namphong, Thailand, where he served as operations officer and then Executive Officer.

In October 1973, he was assigned to Headquarters Marine Corps, Washington, D.C., for duty as the assistant majors' monitor. During October 1976, he reported to the 1st Marine Division, Marine Corps Base Camp Pendleton, California, where he served as operations officer, 2nd Battalion, 5th Marines; executive officer, 3rd Battalion, 5th Marines; and division staff secretary. He was promoted to major on November 1, 1977. In August 1979, he reported to the Marine Corps Command and Staff College as a student.