James W. Flanagan (1805–1887) was a U.S. Senator from Texas from 1870 to 1875. Senator Flanagan may also refer to:
E. J. Flanagan (1883–1957), Washington State Senate Ed Flanagan (politician) (1950–2017), Vermont State Senator Jennifer Flanagan, Massachusetts State Senate John J. Flanagan (born 1961), New York State Senate Webster Flanagan (1832–1924), Texas State Senate