Nathan Anthony Richard Beaulieu (born December 5, 1992) is a Canadian professional ice hockey defenceman who is currently a player of HC Nové Zámky in Tipos Extraliga.

In junior, Beaulieu helped the Saint John Sea Dogs win the 2011 Memorial Cup, and was named to the tournament's all-star team.

[7] Beaulieu made his professional debut in the 2012–13 season with the Canadiens' American Hockey League (AHL) affiliate, the Hamilton Bulldogs.

[11] He remained with the team featuring in 30 games for 7 points before he was ultimately dealt by the Sabres at the trade deadline to the Winnipeg Jets for a six-round pick in the 2019 NHL entry draft on February 25, 2019.

[15] During his fourth year with the Jets, in the 2020–21 season, Beaulieu was traded to the Pittsburgh Penguins in exchange for a conditional 2022 seventh-round draft pick on March 21, 2022.

He initially joined the Anaheim Ducks on a professional tryout (PTO) in preparation for the 2022–23 season before agreeing to a one-year, $850,000 contract following a successful training camp on October 1, 2022.

Leaving the Ducks as a free agent, Beaulieu for the second consecutive season was signed to a PTO, accepting an invitation to the Carolina Hurricanes' training camp on August 22, 2023.

[20] On October 18 of the same year, following just 8 appearances with Barys, Beaulieu was suddenly released by the club along with fellow North American ex-NHLers Michael McLeod and Will Butcher.