Niklas Rubin (born December 23, 1995) is a Swedish professional ice hockey goaltender.

[8] On 30 December 2022 Rubin became the first Ässät goalie to be credited with a goal when TPS player Michael Dal Colle scored on his own net.

[9] On January 26, 2023, Porin Ässät announced that Rubin had signed a one-year extension to his contract.

Rubin helped Ässät to the playoffs after 5 years and played 8 games with a save percentage of .898 and a GAA of 2.76.

[3][18] On 21 November 2023, Ässät announced that Rubin had signed an extension with the club, that will cover the 2024–25 SM-liiga season.