Research suggests that shortcomings exist in the provision of palliative care to people with intellectual disabilities. This mixed-methods study aimed to describe the experience, confidence and attitudes of staff to the provision of palliative care to people with intellectual disabilities. The sample was drawn from the population of one Health Service Executive area in Ireland. Staff from intellectual disability and palliative care services completed surveys and participated in focus group discussions. Three hundred and eighty-nine questionnaires were distributed and 16 focus groups were held. Fifty-nine per cent of palliative care staff and 67% of intellectual disability services staff had cared for someone with intellectual disability who had died but level of experience was low. Both palliative care and intellectual disability services staff lacked confidence in their ability to provide palliative care. Staff were challenged by perceived 'differences' and 'difficulties' in the provision of care. They endorsed a partnership approach to care but focus group discussions revealed that a shared desire to cooperate was insufficient to guarantee effective collaboration.