| Jirnsum | |
| Settlement Type: | Village |
| Pushpin Map: | Netherlands |
| Pushpin Label Position: | right |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in the Netherlands |
| Coordinates: | 53.0781°N 5.7914°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Netherlands |
| Subdivision Type1: | Province |
| Subdivision Name1: | Friesland |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Leeuwarden |
| Unit Pref: | Metric |
| Area Total Km2: | 10.11 |
| Elevation Footnotes: | [1] |
| Elevation M: | 0.4 |
| Population As Of: | 2021 |
| Population Footnotes: | [2] |
| Population Total: | 1,360 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 9011 |
| Area Code Type: | Dialing code |
| Area Code: | 0566 |
Jirnsum (Dutch; Flemish: Irnsum[3]) is a village in Leeuwarden municipality in the province of Friesland, the Netherlands. It had a population of around 1,360 in January 2017.[4]
The village was first mentioned between 1399 and 1401 as Yrntzom, and means "settlement of the people of Irin".[5] Jirnsum developed as a terp (artificial living mound) living along the river. Later, it became a road village. The Dutch Reformed church dates from 1877. The Mennonite church dates from 1684 and received its current form in 1866.[6] In 1840, Jirnsum was home to 525 people.[7] In 1868, the Grou-Jirnsum railway station opened.[8]
Before 2014, Jirnsum was part of Boarnsterhim municipality and before 1984 it belonged to Rauwerdhem.[7]