Newry, Mourne and Down is a local government district in Northern Ireland that was created on 1 April 2015 by merging Newry and Mourne District and Down District. It covers most of the southeastern part of Northern Ireland. The local authority is Newry, Mourne and Down District Council.

Newry, Mourne and Down has a population of 178,996 of which approximately 34% are aged 50 or over.

The city joined the Global Network of Age-friendly Cities and Communities in 2018. 

Newry, Mourne and Down leads the age-friendly programme in collaboration with the Age Friendly Strategic Alliance, a multiagency partnership.