| Sumar | |
| Native Name: | Suameer |
| Settlement Type: | Village |
| Pushpin Map: | Netherlands Friesland#Netherlands |
| Pushpin Label Position: | right |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in the Netherlands |
| Coordinates: | 53.1933°N 6.015°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Netherlands |
| Subdivision Type1: | Province |
| Subdivision Name1: | Friesland |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Tytsjerksteradiel |
| Unit Pref: | Metric |
| Area Total Km2: | 11.69 |
| Elevation Footnotes: | [1] |
| Elevation M: | 1.2 |
| Population As Of: | 2021 |
| Population Footnotes: | [2] |
| Population Total: | 1,355 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 9262 |
| Area Code Type: | Dialing code |
| Area Code: | 0511 |
Sumar (Dutch; Flemish: Suameer) is a village in the municipality of Tytsjerksteradiel, in the province of Friesland, the Netherlands. It lies south of Burgum, on the, and had a population of approximately 1,382 in January 2017.[3]
There is a windmill in the village, De Hoop.
The village was first mentioned in 1453 as suwamer, and means "southern lake". Su (south) was added to distinguish between Eastermar and .[4] Sumar developed in the late middle ages as a collection of spread out farms around the church.[5] The Dutch Reformed church was built in 1769 as a replacement of an earlier church.[5]
Sumar was home to 457 people in 1840.[6] Around 1900, the heath in the area was cultivated.[7] The dairy factory De Harste was built 1908 and is a combination of rational and Jugendstil architecture.[5] The north of the village near the started to industrialize.[6]
The school teacher Kornelis Lieuwes de Vries developed the Bintje potato in 1898 which became one of the most popular potato varieties. The potato was named after the 17-year old Bintje Jansma, one of his students, in 1905.[6]