John Alden Woodcock Jr. (born July 6, 1950) is a senior United States district judge of the United States District Court for the District of Maine.

Born in Bangor, Maine, Woodcock received a Bachelor of Arts degree from Bowdoin College in 1972, a Master of Arts degree from London School of Economics in 1973, and a Juris Doctor from the University of Maine School of Law in 1976.

He was an assistant district attorney (part-time) in the State of Maine from 1977 to 1978.

On March 27, 2003, Woodcock was nominated by President George W. Bush to a seat on the United States District Court for the District of Maine vacated by Gene Carter.

He served as chief judge from 2009, to January 5, 2015.