AIB is to close 15 of its branches this year.
The bank says services will be merged with other nearby locations.
The vast majority of the amalgamations are happening in Dublin and Cork - in urban and suburban locations.
The Dublin branches to close include Donnybrook, Sutton, Sandyford, Skerries, O' Connell Street and Dalkey.
In Cork, the Little Island, Douglas Court and Ballyphehane branches are among those impacted.
Their services will be amalgamated with nearby branches.
AIB says the process will get underway in September and should be complete by December.
The bank says it's made the decision to close the 15 locations due to declining branch visits.
Customers do not need to take any action - and all affected customers will be provided with details from their bank.
AIB Managing Director Retail Banking, Jim O’Keeffe says: "We remain committed to maintaining a strong presence in the communities we serve throughout Ireland, and we will continue to do so with over 170 branches. However, inevitably and in line with the evolution of banking and customer needs, we are seeing a requirement to evolve our services to customers.
"We see that in overall digital usage, with customers interacting with our app more than 1.54 million times a day compared with just 35,000 daily branch visits. That convenience at the tip of our customers’ fingers means they are using branches less.
"We will do everything we can to guide our customers through the transition as we take another step towards ensuring a sustainable future for AIB’s branch network.’"