The Marianas Soccer League 1 is the men's top level professional football competition of the Northern Mariana Islands Football Association.

It is above the Marianas Soccer League 2, but there is no regular promotion/relegation between the two competitions.

The league began as an invitational event in the Northern Mariana Islands.

The league has been operating since 2005[1] and grew to include eight teams in the 2008 season.

In September 2012, the Northern Mariana Islands Football Association (NMIFA) officially launched a two tier completion, usually without promotion and relegation.