The city passed an internationally recognised test conducted earlier this year and met the criteria for offering a safe, vibrant evening and night-time economy.
A panel of experts assessed the city between 5pm to 5am under headings including well-being, movement, appeal, place, and policy, and said it provided a well-managed, diverse, entertaining and enjoyable evening and night out.
The city is among several to receive the award at the Purple Flag ceremony in Guildford in the UK in early November, and will join up to 10 other Irish cities and towns who also fly the flag.
Cork City Centre Forum co-ordinated the bid and praised the collaboration and commitment of over 40 city centre stakeholders and traders.
Forum chair Gillian Keating said the result was the outcome of months of dedicated and hard work by all involved.
“The award is a further jewel in the crown for Cork and places Cork amongst a select group of cities that are celebrated for their unique and appealing evening experience,” she said.
Cork City Council chief executive Ann Doherty, said the award recognises the culture and diversity of the city.
“This is a great result and one that will benefit the city as a marketing and promotion tool as we share the message that Cork City is a destination not to be missed,” she said.
Michelle O’Sullivan, who co-ordinated the Purple Flag bid for Cork Chamber, said the designation will help position the city as a “must visit” location.
The Purple Flag designation comes days after it was announced that Cork City is to receive a Unesco Learning City Award in Mexico City at the second Unesco International Conference on Learning Cities.
University College Cork is one of the four key partners, alongside Cork City Council, Cork Institute of Technology and Cork Education and Training Board, in the initiative, spearheaded by Tina Neylon, the co-ordinator of the city’s Lifelong Learning Festival.