北弗里斯兰县（Kreis Nordfriesland）是德国石勒苏益格-荷尔斯泰因州面积第三大的县，仅次于伦茨堡-埃肯弗德县和石勒苏益格-弗伦斯堡县，也是德国最北面的县，首府胡苏姆。北弗里斯兰县是北弗里斯兰少数民族和丹麦人的故乡，通行5种语言（德语、低地德语、丹麦语、南朱特语和弗里西语的方言北弗里西语），是德国语言最丰富的县，曾经通行于弗里德里希市的荷兰语如今已在那里绝迹了。

Nordfriesland, English "Northern Friesland" or "North Frisia", is a district in Schleswig-Holstein, Germany. It includes almost all of traditional North Frisia along with adjacent areas to the east and south and is bound by (from the east and clockwise) the districts of Schleswig-Flensburg and Dithmarschen, the North Sea and the Danish county of South Jutland. The district is called Kreis Nordfriesland in German, Kreis Noordfreesland in Low German, Kris Nordfraschlönj in Mooring North Frisian, Kreis Nuurdfresklun in Fering North Frisian and Nordfrislands amt in Danish.