Hans Rostgaard (15 April 1625 – 31 December 1684) was a Danish bailiff (ridefoged) and county administrator (amtsforvalter) at Helsingør who is remembered for his achievement in the Second Northern War and especially his role during the Swedish siege of Copenhagen and subsequent assault on the city in 1659.

[1] He became bailiff of Kronborg Fief in 1656 after his engagement to Kirsten Pedersdatter, the daughter of the estate manager of Københavns Ladegård Peder Christensen Svenske (c. 1590–1657) and Anna Jensdatter (1593–1655).

In February 1659, he warned the government in Copenhagen about the Swedish plans of an assault on the city and provided it with detailed information about their preparations and dates.

Later that spring, together with Lorens Tuxen and Henrik Gerner, he was a central figure in the plans to win back the control of Kronborg.

In the forests at Krogerup, he arranged a meeting between the king's servant Corfitz Trolle and the British colonel Hutchinson who supported the plan.

When the plan was revealed in June 1659 and many of the involved were arrested, Rostgaard pretended to have died and managed to escape to Copenhagen where he went underground for the next 11 months to protect his wife back in Helsingør.

In March 1661, the couple was rewarded with full ownership of the Krogerup estate as their property, the rights of a noble and a promise of 300 rigsdaler a year for the rest of their lives.

In 1670, Rostgaard applied for compensation for the discontinued pension and received a number of minor farms and houses in the vicinity of Krogerup in 1672.