| Cyrus Adams Sulloway | |
| State: | New Hampshire |
| District: | 1st |
| Term Start: | March 4, 1915 |
| Term End: | March 11, 1917 |
| Predecessor: | Eugene Elliott Reed |
| Term Start2: | March 4, 1895 |
| Term End2: | March 3, 1913 |
| Predecessor2: | Henry W. Blair |
| Successor2: | Eugene Elliott Reed |
| Order3: | Member of the New Hampshire House of Representatives |
| Term Start3: | 1873 |
| Term End3: | 1878 |
| Birth Date: | June 8, 1839 |
| Death Date: | March 11, 1917 (aged 77) |
| Death Place: | Washington, D.C. |
| Party: | Republican |
| Profession: | Attorney |
Cyrus Adams Sulloway (June 8, 1839, Grafton, New Hampshire – March 11, 1917) was an attorney and Republican member of the United States House of Representatives from New Hampshire.
Sulloway studied law and was admitted to the bar in 1863.
Sulloway served as a member of the New Hampshire House of Representatives from 1873 to 1878.
Sulloway served in the United States House of Representatives from March 4, 1895, to March 3, 1913, and from March 4, 1915, until his death in Washington, D.C.. In his 1896 reelection he won with a majority of 11,733.