John Hargrave (c. 1788−1833) was an Irish architect who was active mainly in Ireland in the early 19th century.
[2] John Hargrave was responsible for the design of a number of manor houses in Ireland, including Castle Forbes (c. 1819), Doory Hall (c. 1820), Drenagh (c. 1825), and Favour Royal (1825).
[5][6] His architectural practice had an office on Talbot Street in Dublin.
[1] Several other members of Hargave's family were also involved in architecture and construction, including his brother Abraham Addison Hargrave (d.1838).
[2] John Hargrave died, along with his wife and children, in a yachting accident in Cardigan Bay on 30 August 1833.