The Nordic Mathematical Contest (NMC) is a regional competition in mathematics for secondary school students from the five Nordic countries: Denmark, Finland, Iceland, Norway and Sweden. The contestants—at most 20 from each country—are elected by the national secondary school mathematical olympiad organisations:

- Denmark: Georg Mohr-Konkurrencen
- Finland: Suomen matematiikan olympiavalmennus
- Iceland: Stærðfræðikeppni framhaldsskólanema
- Norway: Abelkonkurransen
- Sweden: Skolornas matematiktävling

Participation does not involve travelling abroad. The contestants normally write the exam in their own school; some countries gather their contestants in one place for the event. The national organisations take turns to host the NMC according to a fixed schedule. (See clause 4 of the regulations.) The host issues the exam paper based on suggestions of problems by the participating countries and does the final marking of the scripts after a preliminary marking in the individual countries. The paper consists of four problems and the scores may range from 0 to 28 points with a complete solution of one problem giving 7 points. (Before 2015 the total maximum was 20 points and the maximum for one problem 5 points.) Each contestant gets a diploma of participation issued by the host. For the contestants with the best results, the diploma states their rank. No other prizes are given.