Emergency crews were called to his Wicklow estate after a tree surgeon suffered a deep gash in his leg.
Richie O'Toole was airlifted from the home of De Burgh and his wife Diane after the accident
He was kept in for a number of hours where he received stitches to his leg and was also treated for shock.
"This could have been a lot worse but the man in question is an experienced tree surgeon and was thankfully used to using a chainsaw," a source explained.
Lady In Red singer Chris De Burgh (64) and his family became aware of the accident over the weekend.
His daughter, former Miss World Rosanna Davison, confirmed the incident to the Herald.
"My mum mentioned that a tree surgeon had to be brought to hospital as he injured himself with a chainsaw," she said.
Mr O'Toole, who works for Djouce Tree Services, was released from hospital at the weekend and is expected to make a full recovery.
A spokesman for the company, which also carries out work for Hollywood actor Daniel Day-Lewis, described the accident as "minor".
"An incident did take place involving our employee when he was using a chainsaw. He received a couple of stitches," he told the Herald.
"He is perfectly okay and was at a rugby match on Saturday with his family.
"He is well used to this type of work," he added.
Mr De Burgh lives on the Wicklow estate with his wife Diane (57) and sons Hubie (24) and Michael (21).
The estate, which is 29 acres wide, boasts a luxurious Georgian property where the family lives.