Wyndmere ( WYN-meer) is a city in Richland County, North Dakota, United States. The population was 429 at the 2010 census. Wyndmere was founded in 1883 and named after Windermere in England. It is part of the Wahpeton, ND–MN Micropolitan Statistical Area.
Wyndmere is located at 46°15′51″N 97°7′53″W (46.264182, -97.131413).
According to the United States Census Bureau, the city has a total area of 0.88 square miles (2.28 km2), all land.
As of the census of 2010, there were 429 people, 192 households, and 117 families living in the city. The population density was 487.5 inhabitants per square mile (188.2/km2). There were 226 housing units at an average density of 256.8 per square mile (99.2/km2). The racial makeup of the city was 95.6% White, 0.2% Native American, 0.2% Asian, 2.6% from other races, and 1.4% from two or more races. Hispanic or Latino of any race were 6.1% of the population.
There were 192 households, of which 27.1% had children under the age of 18 living with them, 52.6% were married couples living together, 4.2% had a female householder with no husband present, 4.2% had a male householder with no wife present, and 39.1% were non-families.