Details on the number of households qualified for social housing support in each local authority administrative area are provided in the annual statutory Summary of Social Housing Assessments (SSHA).
The most recent summary, conducted in November 2020, shows that 61,880 households were assessed as qualified for and being in need of social housing support. This represents a decrease of 6,813 households or 9.9% on the last assessment in June 2019. Since 2016, the numbers have decreased from 91,600 to 61,880, a reduction of 32.4%.
Below is the link to the summary report for 2020 which includes breakdowns by each local authority across a range of categories.
SSHA 2020 Report
www.gov.ie/en/publication/970ea-summary-of-social-housing-assessments-2020-key-findings/#:~:text=The%20Summary%20of%20Social%20Housing,is%20not%20currently%20being%20met .
In relation to the specific question posed regarding the number of single persons on Mayo County Council social housing list, tables 2.4 and A1.4 of the report provide details on household size.
With respect to the average wait time for a single person to access long-term housing through Mayo County Council, information of this exact type is not held by my Department. However, details on the length of time spent on the record of qualified households (waiting lists), for each local authority can be found at tables 2.8 and A1.8 of the report.
It should be noted that the SSHA is a point in time snapshot of the demand for social housing support in each local authority area and does not necessarily reflect the dynamic nature of entry to and exit from the housing waiting lists.