Arnold Neilson Smith (8 June 1889 – 24 July 1957) was a member of the Liberal party who served in the House of Commons of Canada.
He was active in various roles, including serving as president of the Cornwall Board of Trade and of Stuebing Lift Truck Systems Ltd.
He also held the positions of president and manager of the Montreal and Cornwall Navigation Company.
Additionally, Smith served as a Life-Governor Cornwall General Hospital and as Deputy Chief Commissioner of the Liquor Control Board of Ontario.
He served one term before being defeated by Frank Thomas Shaver of the Conservatives in the 1930 federal election.