There were over 4,000 people employed in IDA client companies in the Shannonside region last year.
The figures were released by Enterprise Minister Peter Burke following a Parliamentary Question by Fianna Fáil TD Cathal Crowe.
Roscommon has the most IDA supported jobs locally with 1,625.
Longford was close behind with just over 1,500 jobs whilst almost 1,200 people in Leitrim were employed in IDA client companies last year.