The 2025 Marianas Soccer League 1 is the 5th season of the Marianas Soccer League 1 and the 20th season overall of top-flight domestic football in Northern Mariana Islands.
Five teams competed in the league, two of which being development teams employed by the Northern Mariana Islands Football Association.
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The new season format saw the bottom 2 teams play a play-in match to determine who qualifies for the semi-final while the top three teams gets automatic qualification to the semi-final.
The winner of the play-in match gets the fourth seed in the semi finals. The playoffs started on 4 May 2025.
<sup>4</sup> Player scored 4 goals.