Alexander Stanislavovich Romanov (; born 6 January 2000) is a Russian professional ice hockey player who is a defenceman for the New York Islanders of the National Hockey League (NHL). He was selected in the second round, 38th overall, by the Montreal Canadiens in the 2018 NHL entry draft.
After two seasons playing in the Kontinental Hockey League (KHL), Romanov was signed to a three-year, entry-level contract by the Montreal Canadiens on 13 July 2020. Making his debut with the team for the COVID-shortened 2020âÂÂ21 season, Romanov played in 54 of 56 regular season games. However, he took to the ice in only four of the 22 games in the Canadiens' deep playoff run to the 2021 Stanley Cup Final. On 5 July 2021, he became the youngest defenceman in Canadiens history to score a goal in the Stanley Cup Final.
On 7 July 2022, during the 2022 NHL entry draft, Romanov was traded by the Canadiens, along with a fourth-round pick, to the New York Islanders in exchange for a first-round pick (13th overall). Canadiens general manager Kent Hughes said it was "very difficult" to trade Romanov, but that it was a necessary step in a series of trades to acquire centreman Kirby Dach from the Chicago Blackhawks.
On 1 July 2025, Romanov signed an eight-year, $50 million contract with the Islanders.
Romanov represented Russia junior team at the 2019 World Junior Championships. He finished with one goal and seven assists, anchoring the Russian defence en route to a bronze medal. Romanov was named the best defenceman of the tournament by the IIHF Directorate and was voted to the All-Star team.
Romanov's maternal grandfather is Zinetula Bilyaletdinov, who played for the Soviet Union national team from 1974 to 1987 and coached the Russia men's team from 2011 to 2014. His father is former KHL player Stanislav Romanov.
In October 2020, Romanov married longtime girlfriend and former rhythmic gymnast Sofia Krasovskaya. Romanov and his wife have one daughter.