Leitrim has just a third of the occupational therapy service it should have.
Two full-time occupational therapists are currently on maternity leave and two more are working half-time.
Sligo-Leitrim TD Martin Kenny says that as of the end of June, there were 155 children and 287 adults in his constituency waiting to see an occupational therapists.
He describes the figures as ‘staggering’.
The Sinn Féin deputy obtained the information in response to parliamentary questions after receiving a raft of complaints from people about the delays they are experiencing.
He says the waiting times are proving particularly frustrating for parents of children and for older people recovering from health crises including strokes who are seeking treatment.
He called on Minister for Health Simon Harris to ensure the HSE has the resources to provide cover for staff when they go on leave.