Nienhuis is a Dutch toponymic surname. It is a form of Nieuwenhuis ("new house") found most commonly in the provinces of Groningen and Drenthe. [1]
In 2014, 57.6% of all known bearers of the surname were residents of the Netherlands (frequency 1:9,281), 33.4% of the United States (1:342,418) and 5.4% of Canada (1:213,942).
In the Netherlands, the frequency of the surname was higher than national average (1:9,281) in the following provinces: [2]