Senator McDermott may refer to:
- Allan Langdon McDermott (1854–1908), New Jersey State Senate
- Frank X. McDermott (1924–2011), New Jersey State Senate
- Jim McDermott (born 1936), Washington State Senate
- Joe McDermott (politician) (born 1967), Washington State Senate
- Joseph H. McDermott (1871–1930), West Virginia State Senate
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