Kaggeholms gård is a manor at Ekerö Municipality in Stockholm County, Sweden.

[2][3] In 1647, Count Lars Kagg (1595–1661) acquired an estate on the island of Helgö situated in Lake Mälaren which he named Kaggeholm.

In the 1720s, construction of the manor house began after drawings by Baroque architect Nicodemus Tessin the Younger (1654–1728).

[4][5][6] Today Kaggeholm is operated as a conference center managed by the Swedish property development company Sisyfosgruppen Holding.

The castle was the setting of the fictional boarding school Hillerska in Netflix's series Young Royals.