Sir Joseph Henry Greer KCVO (9 February 1855 – 25 August 1934) was an Irish soldier, politician, and racing horse owner and breeder.

He was born in County Tyrone, was educated at Wellington and joined the 74th Highlanders after military college.

[1] He was appointed as Director of the Irish National Stud in 1915.

[2] He also became the Aga Khan III's first stud manager.

[4] He was nominated to the Seanad by the President of the Executive Council in 1922 for 6 years.