| Welsum | |
| Coordinates: | 52.3358°N 6.0911°W |
| Subdivision Type: | Country |
| Subdivision Name: | Netherlands |
| Subdivision Type1: | Province |
| Subdivision Name1: | Overijssel |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Olst-Wijhe |
| Pushpin Map: | Netherlands Overijssel#Netherlands |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in the province of Overijssel in the Netherlands |
| Elevation Footnotes: | [1] |
| Elevation M: | 5 |
| Area Total Km2: | 8.89 |
| Population Footnotes: | [2] |
| Population Total: | 625 |
| Population As Of: | 2021 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 8196 |
| Area Code Type: | Dialing code |
| Area Code: | 0570 |
Welsum is a village on the left bank of the river IJssel in the present municipality of Olst-Wijhe in the Dutch province of Overijssel.
The village is the source of the Welsummer chicken breed. In 2001, a number of farms culled their flocks in connection with the outbreak of foot-and-mouth disease.
The earliest existing written mention of the village (as Wilsum, kerspel Olst) dates from 1295.[3] The tower of the Protestant church was built around 1475. The village's flour mill, Houdt Braef Stant, dates to 1856, with restorations in 1963 (using internal parts from the mill Wippe in Hellendoorn) and 1986. It is currently being used as a dwelling.