Foldereid is a village and a former municipality in the northern part of Nord-Trøndelag county, Norway. The municipality encompassed the area surrounding the inner part of the Folda fjord, the Innerfolda. The village of Foldereid is located along the fjord in the present-day municipality of Nærøy, just a short distance from the border with Nordland county.
The municipality of Foldereid was established on 1 October 1886 when it was separated from Kolvereid. Initially, the new municipality had 948 residents. On 1 January 1964, the municipality was dissolved. The eastern Kongsmoen area (population: 221) was merged into Høylandet and the remainder of the municipality (population: 817) was merged into Nærøy.