Following his death in 1784, the estate was
run by his widow Mary Ramsay till her death in
1788. Auchincruive then passed to their son
Richard Alexander Oswald, a government
contractor during the American War.
More recently, Auchincruive was gifted to
the Secretary of State by John Hannah of Girvan
Mains. It became the home of the Scottish
Agricultural College with the Hannah Research
Institute being named in his honour.
The estate is also available for use as a
venue for outdoor events such as the Ayr
Agricultural Show. Oswald Hall can be booked
for conferences or musical events. The grounds
around the house and along River Ayr can be
used by the public for scenic walks.