In Kildare, 32 knives were seized in 2016, but that rose, sharply, to 72 last year.
Sweeping new laws to tackle knife crime are set to be introduced, including a ban on so-called 'zombie knives.'
The weapons are inspired by horror films, and are said to do more damage when being removed, than being inserted.
While a new offence of carrying a knife 'with intent' will be introduced, bringing with it a jail term of up to 10 years.
In Kildare, 32 knives were seized in 2016, but that rose, sharply, to 72 last year.
Minister for State for Justice James Browne has told the Sunday Independent he also wants to introduce a minimum age of 16 to purchase a knife.

Senator Seeks Mandatory Jail Terms For Tool Theft
More Than €1.5 million Spent Cleaning Up Illegal Dumping On The Curragh
150 jobs To Be Created At New €15m Applegreen Service Area In Naas
Demand for GPs Outstrips Growth In Kildare And Across Ireland
Kfm Obituary Notices
Curragh Family Resource Centre Receives Funding Under Expanded Mental Health Initiative
Campaign Group Raises Fresh Safety Concerns Over Moone-Timolin Cycle Lane
Sale Of Electric Vehicles Reach Record High In July