| Dalfsen | |
| Settlement Type: | Municipality |
| Flag Size: | 100x67px |
| Map Alt: | Highlighted position of Dalfsen in a municipal map of Overijssel |
| Coordinates: | 52.5°N 21°W |
| Subdivision Type: | Country |
| Subdivision Name: | Netherlands |
| Subdivision Type1: | Province |
| Subdivision Name1: | Overijssel |
| Governing Body: | Municipal council |
| Leader Party: | PvdA |
| Leader Title: | Mayor |
| Leader Name: | Erica van Lente |
| Unit Pref: | Metric |
| Elevation Footnotes: | [1] |
| Elevation M: | 3 |
| Population Demonym: | Dalfsenaar, Dalfser |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postcode |
| Postal Code: | 7710–7714, 7720–7729, 8150–8159 |
| Area Code Type: | Area code |
| Area Code: | 0529, 0572 |
Dalfsen (pronounced as /nl/; Dutch Low Saxon: Dalsen) is a municipality and a town in the Salland region of the Dutch province of Overijssel. The municipality of Dalfsen was increased to its current size on 1 January 2001 through the amalgamation of the municipalities of Nieuwleusen and Dalfsen. A variety of Sallands is spoken here by segment of the population.
The name first appears in documents in 1231. Due to the closeness of Kasteel Rechteren, Dalfsen is one of several towns along the Overijssel section of the Vecht river never to have received city rights.
In 2015, archaeologists found a burial ground dating from the TRB-period (3000-2750 BC) containing 141 burial pits. The TRB dates back to the last phase of the Middle Neolithic period, which is known for its megalithic monuments in northern Europe.[2]