Stephen J. Stilwell (May 10, 1866 – April 20, 1942) was an American lawyer and politician from New York.
For some time he owned and edited The Reformer, the Democratic newspaper of Mount Vernon.
Stilwell was convicted of bribery, and automatically forfeited his seat in the State Senate on May 24, 1913.
In April 1941, he was arrested on a charge of attempted bribery, and remained incarcerated in the Westchester County Jail.
On February 9, 1942, he pleaded guilty, and died on April 20 in Grasslands Hospital in Valhalla, New York, where he was receiving medical treatment while awaiting sentence in custody.