Simlångsdalen is a locality in Halmstad Municipality, in Halland County, Sweden. Simlångsdalen lies at 92 m above sea level, by the Fylleån. It has 692 inhabitants (2023). The nearest city is Halmstad, 17.7 km to the west. Among the landmarks around are St. Nicholas Church (17.7 km), Tolarp passage grave (8.7 km) and Enslöv Church (10.6 km). Among the natural features are Danska fall (1.4 km).