Henry W. Blair (1834–1920) was a U.S. Senator from New Hampshire from 1879 to 1891. Senator Blair may also refer to:
- Austin Blair (1818–1894), Michigan State Senate
- Craig Blair (born 1959), West Virginia State Senate
- Francis Preston Blair Jr. (1821–1875), Missouri State Senate
- John Blair (Tennessee politician) (1790–1863), Tennessee State Senate
- William Blair (American politician) (1820–1880), Wisconsin State Senate
This disambiguation page lists articles associated with the title Senator Blair.
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