Carr was born in Ponsonby, Auckland in 1886. His father was the Rev. Thomas Goodwill Carr. Carr was educated at Nelson College from 1899 to 1902. Ordained as a minister in 1915, he was on the Christchurch City Council between 1923 and 1927 and the Hospital Board in the 1920s, after working in commerce and banking. Carr was also committed to animal welfare and in April 1936 he was elected to the office of President of the federated Societies for the Prevention of Cruelty to Animals. Carr joined the Labour Party in the early 1920s. He unsuccessfully sought the Labour nomination in the in the,, and electorates. He moved to Timaru to contest the in the electorate; he had no prior family or other connection to this provincial town. His 1928 election win was an unexpected upset, ousting the popular local lawyer Frank Rolleston, who was Attorney-General, Minister of Justice, and Minister of Defence at the time. Rolleston was the son of William Rolleston, one of the most influential politicians of the 19th century in Canterbury. Carr represented the Timaru electorate from 1928 to 1962, when he resigned. His long representation of the electorate is unique in that a provincial town was not a safe Labour seat, and he had no prior relation with the people of Timaru before moving there to contest the 1928 election. He was a dissident, getting three votes when he ran against Peter Fraser for Labour's leadership in 1940 to replace Savage as party leader. He was not appointed to any ministerial positions, but was Chairman of Committees and Deputy Speaker. He was Vice-President of the Labour Party and President. Carr was widely read, and could assist the whips if the party was caught “on the hop” by speaking for his full-time while the party reorganised. He had a struggle to exist on his Parliamentary salary and also contribute to local raffles and fundraisers. To save money he lived in his office, sleeping on a day-bed, although Nash tried to ban this for a time. In 1935, he was awarded the King George V Silver Jubilee Medal. His wife died in April 1961 and he moved back to Christchurch soon after. He resigned from Parliament on 31 May 1962, and died on 18 September 1962.
Books by Carr
*The two books above contain sketches of parliamentarians: many published in the "New Zealand radio record."