John Irving (5 October 1766 – 10 November 1845) was an Irish landowner, industrialist and MP. He was the proprietor of the Magheramorne estate in County Antrim in the 19th century and was an improving landlord who encouraged tenants to improve the land through provision of lime for fertilisation, and incentives for those who drained and erected ditches. He also built a row of labourer's cottages which had two acres attached to each to encourage self-sufficiency. Irving majored in developing what was then known as , building quays and a railway, and expanding the production. In 1834 130,000 barrels of lime were exported at 10d per barrel, amounting to over £5400. 300 tons of limestone was exported, valued at £22 and 624 tons of flint amounting to a value of £140. Ships traded with County Do