The number of people hospitalised due to stabbings increased by 9% last year.
There was also a rise in the number of people who were treated for gunshot wounds.
164 people had inpatient admissions in hospital in 2018 after being assaulted with a knife.
This increased to 178 last year, according to Freedom of Information figures released to Newstalk.
167 of those were men and 11 were women, with the largest amount in the greater Dublin area.
100 of the patients were aged between 18 and 35, but 13 were children under 18.
Retired Detective Inspector Patrick Marry said knife crime is a huge problem among young people.
He explained: "Every year we see murders or injuries where knives have been used.
"The carrying of knives is probably synonymous with young people - they find it a comfort to carry a knife in case they're attacked, or if they have a drugs debt or anything of that nature.
"That is a problem, because young people can end up using knives when they may not be in full fettle about the damage they could do with a knife if they use it."
There was also a slight rise in the number of people treated for injuries they got from being shot with a handgun.
25 people were hospitalised last year - up from 23 in 2018.