It is understood the deceased was married with children.
Gardaí said they responded to reports of a workplace accident in the Castletown area shortly after 12.30pm on Tuesday afternoon.
The man in his thirties, who is yet to be named, is reported to have suffered fatal injuries.
Gardaí and the Health and Safety Authority are investigating, and the local coroner has been notified.
It is understood the deceased was married with children.
It's the second incident on a farm in three days. An investigation was launched after a man was seriously injured while working on his farm in Co Cavan at the weekend.
He was air-lifted to hospital in Dublin after emergency services were called to the scene at Butlerbsbridge, shortly before 11am on Saturday morning.
The Health and Safety Authority are also investigating this incident.

Wholesale Electricity Prices 56.2% Higher Than Last Year
Reactions From Maynooth Students As Leaving Certificate Results Released
"Government Making Our Lives Hugely Difficult": Pressure Mounts On HSE To Approve Friedreich's Ataxia Drug
Government Leaders Agree To Not Increase Excise Duty For Fuel Next Month
Over 600 Extra Yearly Places Announced For Third Level Healthcare Courses
Four Men Arrested Over Numerous Burglaries During Garda Operation In West Dublin
Over 70,000 Students To Receive Leaving Certificate Results Today
Irish Rail Re-Introducing Tea Trolleys For Dublin/Galway Services As Part Of Pilot Project