Wyndmere (/ˈwaɪnmɪər/ WYN-meer) is a city in Richland County, North Dakota, United States.

According to the United States Census Bureau, the city has a total area of 0.86 square miles (2.23 km2), all land.

There were 226 housing units at an average density of 256.8 per square mile (99.2/km2).

35.9% of all households were made up of individuals, and 13.6% had someone living alone who was 65 years of age or older.

There were 247 housing units at an average density of 282.1 per square mile (108.9/km2).

27.1% of all households were made up of individuals, and 12.6% had someone living alone who was 65 years of age or older.