John A. Gilmour[1] (born May 17, 1993) is a Canadian professional ice hockey defenceman who is currently playing for Adler Mannheim of the Deutsche Eishockey Liga (DEL).

On July 1, 2019, Gilmour left the Rangers as a free agent to sign a one-year, one-way $700,000 contract with the Buffalo Sabres.

[11] He began the 2019–20 season, with the Sabres as a healthy scratch before he was assigned on a conditioning stint to AHL affiliate, the Rochester Americans.

As a free agent from the Sabres, and with the 2020–21 North American season delayed due to the COVID-19 pandemic, Gilmour belatedly signed a contract abroad in agreeing to a one-year deal with Russian club, HC CSKA Moscow of the KHL, on December 14, 2020.

[12] Following two seasons with CSKA, culminating in capturing the Gagarin Cup, Gilmour left as a free agent and was signed to a two-year contract to continue in the KHL with Belarusian club, HC Dinamo Minsk, on July 24, 2022.