Details on the number of households qualified for social housing support in each local authority area are set out in the statutory Summary of Social Housing Assessments (SSHA). Since 2016, the summary process has been carried out on an annual basis.
The most recent summary, which was carried out in 2018, details the number of households on all local authority waiting lists, including Co. Mayo, as at 11 June 2018 and can be found on my Department's website at the following link:
My Department is currently working with the Housing Agency on the 2019 summary. I expect the results of that summary to be available early in the final quarter of this year.