James Henry Vahey (1900–1949) was an American lawyer and political figure who served as chairman of the Massachusetts Democratic State Committee.
His father, James H. Vahey Sr., was a prominent attorney and two time Democratic nominee for Governor of Massachusetts.
Following his death in 1929, the younger Vahey took over the firm and also succeed his father as counsel for the Boston Street Carmen's Union and general counsel for the Amalgamated Association of Street and Electric Railway Employees of America.
He was responsible for getting the military to revise the records of pilots who broke down after many missions over enemy territory.
Following Dever's election he and his chief secretary J. John Fox, both former law school classmates of Vahey's, backed him for chairman of the Massachusetts Democratic State Committee.