Osaby, Manor house in Växjö Municipality, Sweden

Osaby is a manor house in Tävelsås parish, Växjö Municipality, on the eastern shore of Lake Vederslövssjön about 15 km south of Växjö. The main building was erected in 1852 by General Erland Hederstierna. The estate is surrounded by a well-preserved agricultural landscape and borders the Osaby nature reserve with several hiking trails.

Osaby is first mentioned in writing in 1403. From the 16th century until 1720 the estate belonged to the Ulfsax family, and the present main building was erected in 1852 by General Erland Hederstierna, whose descendants owned Osaby until 1916. Professor Frans Wilhelm Törne of Lund bought the estate in 1936; his daughters kept it until their deaths in 1969, when it was bequeathed to the Swedish Society for Nature Conservation.

The name Osaby refers to the estate in Tävelsås parish, first recorded in 1403. From the 16th century to 1720 the Ulfsax family owned the manor, and General Erland Hederstierna built the current main building in 1852. Since 1969 the Swedish Society for Nature Conservation has owned the surrounding agricultural landscape, and in June 2020 the buildings were sold to Nils Hector, who plans a guesthouse and event venue called Herrgård de luxe.

The manor offers rooms within the house itself or family accommodations in the renovated coachman's house, with weekend café service available. The lakeside location provides direct access to walking trails and the surrounding natural areas.

The Osaby nature reserve, with several hiking trails through deciduous woodland, borders the estate itself. The land and its well-preserved agricultural landscape have belonged to the Swedish Society for Nature Conservation since 1969, when the owner's daughters bequeathed the whole property to the society.