Calvin Woodrow Ruck CM (September 4, 1925 – October 19, 2004) was a human rights[1] activist and a member of the Senate of Canada.

He held a number of positions within the Nova Scotia Association for the Advancement of Coloured People and was a member for most of his adult life.

In the 1950s and 1960s, he organized campaigns against businesses in the Dartmouth area, including barber shops, which refused to serve black people.

He campaigned tirelessly for the Canadian Government to recognize the heroics of Jeremiah Jones during the Battle of Vimy Ridge.

In 1998, he was appointed to the Senate of Canada by Prime Minister Jean Chrétien, where he served until reaching the mandatory retirement age of 75 in 2000.