A new report shows that An Post's gender pay gap stands at 3.71% compared to a rate of 13.9% nationally.
Launching its first Gender Pay Gap Report and Action Plan, An Post said is is changing from an old world of mail and cash to a new world of e-commerce and financial services.
The company's gender pay gap also compares favourably with a rate of 20% globally, 16% in the European Union and 17.9% in the UK.
Since it launched its transformation programme in 2017, An Post has moved from an all-male to a 50/50 gender balanced management board, while it has also recruited 50% male and 50% female candidates to its graduate programme.
But 67% of the company's senior management group is made up of men, while 33% are women.
An Post staff are also mostly men with a gender balance of 75% to 25%.
An Post said it now talks about diversity issues with its unions and has started to promote "work life harmony" with a range of initiatives.
These include term time working, work sharing, options to work part-time, enhanced parental leave arrangements, flexi-time and career break options.
Aoife Beirne, Chief of Staff at An Post, said that by publishing today's report, the company is publicly committing to full gender equality.
"Over the last three years, we recognised the need for a more inclusive workplace, one that is sustainable into the future and to closing the gender pay gap," Ms Beirne said.
"Our journey is underway and by working with our colleagues and our unions, we are committed to a fully diverse and inclusive workplace," she added.
David McRedmond, CEO of An Post, said the company wants to be a leader in gender equality and as Ireland changes so must An Post to become an exemplar for equal opportunity.
"Our management Board is 50% male, 50% female. Our gender pay gap is better than most organisations. We are starting the conversation internally and externally," the CEO said.
"We are eliminating bias in our communication and we are implementing an action plan company-wide," he added.
