Longforgan is a village and parish in the Carse of Gowrie, in Perth and Kinross, Scotland. It lies 5 miles (8.0 km) west of Dundee on the main A90 road.
A record survives of Sir Patrick Gray, as Baron of Longforgan, holding a baronial court here in 1385 on the Longforgan or Hund Hill; a moot hill. The officials present were the same as those at of the sovereign's courts. The village was created a burgh of barony in 1672.Castle Huntly, established in the 14th century and developed in the 17th and 18th centuries, is located 0.5 miles (0.80 km) south-west of the village. It is now an open prison. A woodland (huntly woods) is situated 0.7 miles away from the village. There is evidence that a Roman Camp was built in Huntly woods.
St Modwenna, who died in 521, is said to have founded a church at Longforgan. The present church, which probably stands on its site, was practically rebuilt in 1794, but during renovation about 1900, 15th century mouldings were discovered. A probably 13th century cross and a tombstone dated 1400, from the churchyard are preserved in the church.