| Timothy Byron Rider | |
| Constituency Mp: | Stanstead |
| Parliament: | Canadian |
| Predecessor: | Charles Carroll Colby |
| Successor: | Alvin Head Moore |
| Term Start: | 1891 |
| Term End: | 1896 |
| Birth Date: | 8 January 1848 |
| Birth Place: | Fitch Bay, Canada East |
| Party: | Liberal |
Timothy Byron Rider (January 8, 1848 - December 2, 1917) was a merchant and political figure in Quebec, Canada. He represented Stanstead in the House of Commons of Canada from 1891 to 1896 as a Liberal member.
He was born in Fitch Bay, Canada East, the son of Ezra B. Rider who came to Lower Canada from New Hampshire. Rider operated a sawmill and grist mill. In 1871, he married Mary E. Shaw. He was a member of the town council for Stanstead, also serving as mayor for eight years; he was also postmaster at Fitch Bay. Rider defeated Charles Carroll Colby, who had represented to the riding for 24 years, to win the 1891 federal election, but was defeated when he ran for reelection in 1896.