It opens each day from 9am to 5.30pm Monday to Friday and from 9am to 1pm on Saturdays
"Great news for the community," said local Fine Gael TD Pat Deering as he welcomed the new Post Office in Ballon opening on Monday.
The office is located at Zerafa's Centra Convenience store and the Postmaster is Andrea Zerafa.
It opens each day from 9am to 5.30pm Monday to Friday and from 9am to 1pm on Saturdays.
Deputy Deering added: "Ballon has been served by a postal agency for a number of years. The new post office replaces the former agency and is one of only two new post offices being open by An Post in the first quarter of this year.
"It is great news for the community and the services provided will continue to help the local residents."