| Roger Johnson Smyth | |
| Office: | Member of Parliament for Lisburn |
| Term Start: | 11 December 1852 |
| Term End: | 19 September 1853 |
| Predecessor: | James Emerson Tennent |
| Successor: | Jonathan Joseph Richardson |
| Birth Date: | 1815 |
| Nationality: | Irish |
| Party: | Peelite/Conservative |
Roger Johnson Smyth (1815 – 19 September 1853)[1] was an Irish Conservative and Peelite politician.[2] [3]
Smyth became Peelite MP for Lisburn at a by-election in December 1852—caused by the resignation of James Emerson Tennent—but died less than a year later in 1853.[4]