Henry Hakewill (4 October 1771 – 13 March 1830) was an English architect.
He began work on a country mansion and eventually had a large and flourishing practice, mostly concerned with country houses. In 1809, he was appointed architect to Rugby School, where the gothic buildings and chapel are his designs. He also did work for the Radcliffe trustees at Oxford and the Middle Temple.
He designed two distinguished Greek Revival buildings:
- Coed Coch, Dolwen, Denbighshire, Wales (1804), a country-house with a diagonally placed portico (demolished) and stair
- St Peter's Church, Eaton Square, London (1824–7, but rebuilt after a fire in 1987).
On 14 November 1804, he married Anne Sarah Frith, daughter of Rev. Edward Frith of North Cray, Kent. They had seven children including two sons who were also architects: John Henry Hakewill (1811-1880), and Edward Charles Hakewill (1812-1872).
- An account of the Roman villa discovered at Northleigh Oxfordshire in the years 1813, 1814, 1815, 1816 (1823)