| Arnold Neilson Smith | |
| Birthname: | Arnold Neilson Smith |
| Birth Date: | 1889 6, df=yes |
| Birth Place: | Cornwall, Ontario, Canada |
| Spouse: | Jane Bates m. 15 September 1914[1] |
| Riding: | Stormont |
| Predecessor: | Charles James Hamilton |
| Successor: | Frank Thomas Shaver |
| Term Start: | September 1926 |
| Term End: | May 1930 |
| Profession: | shipowner |
| Party: | Liberal |
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. Born in Cornwall, Ontario, Smith was a shipowner by profession.
Smith attended public and secondary schools at Cornwall. 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 was first elected to Parliament at the Stormont riding in the 1926 general election. He served one term before being defeated by Frank Thomas Shaver of the Conservatives in the 1930 federal election.