National road 37 (, abbreviated as DK37) is a main road (class G road)() route belonging to Polish national roads network, located in West Pomeranian Voivodeship. With its length of , the route connects the town of Darà Âowo with national road 6 near Karwice. In the future a new junction will be constructed, linking road 37 with expressway S6.
Until December 31, 2005, the route was categorized as powiat road () 0507Z (even earlier 17-451). On January 1, 2006, based on the Regulation of Minister of Infrastructure, of May 6, 2005, the route was included in the category of national roads.
The matter of upgrading the road category to national road was for some time on the circle of interests of politicians, mostly from Samoobrona party. The route had a particular importance for Andrzej Lepper, who lived in Zielnowo near Darà Âowo. Because of that, the road has been nicknamed "Lepperówka".
From March 13, 2021, vehicles with a single drive axle load of up to are allowed to travel on the entire route.
Earlier on the entire route maximum permissible axle load was .