The number of marriages has fallen by 7.7% between 2014 and 2024.
Information released by the Central Statistics Office shows that over the ten year period, the number of couples tying the knot went from 22,045 to 20,348.
Ceremony preferences have also changed in the past ten years.
Roman Catholic ceremonies were the most common marriage type in 2014 at 13,071, but by 2024, these had fallen by almost 51% to 6,425, making them the second most popular choice for couples.
In 2024, Civil Registrations were the most popular type of ceremony at 6,743.
There was also a 68% rise in the number of Humanist ceremonies between 2014 and 2024.
The five most popular ceremony types in 2024 were: Civil Registrations, Roman Catholic, Humanist, Spiritualist Union of Ireland, and OneSpirit. These accounted for 85% of all wedding ceremonies in Ireland.
Statistician in the Life Events and Demography Division, Seán O'Connor, said: "Each year the CSO publishes detailed statistics as part of our series of releases on Marriages. These include the number of marriages, the ages of bride and groom, the county of marriage, and the form of ceremony.
"Today's release, which is a CSO Frontier Series, provides a 10-year analysis of the different types of marriage ceremonies chosen by people in Ireland, and how the types of ceremonies have changed over the years 2014-2024.
"Overall, fewer couples are getting married in Ireland. Between 2014 and 2024, the number of marriages (including both opposite and same-sex couples) decreased by 7.7% from 22,045 to 20,348."
'There's no one way to do it'
Ciara Elliot, editor of wedding website, 'One Fab Day', said there are now 700 non church venues in Ireland where you can get married.
Speaking to RTÉ's News at One, Ms Elliot said: "We're a less religious, more secular country now so people are making that choice, as you see from the statistics."
"It seems like a weekend or two days is quite standard now. The reality is that Irish people love a party, so it's very hard to get away with anything less. But there's no one way to do it. You can obviously get married without even having a wedding but people want to celebrate. The big difference now is maybe people are doing it because they want to do it, not because they have to do it."
She said: "Even a second and third wedding is still a really important occasion, and they'll just be doing it maybe in a different way, but all the ingredients of a first time around wedding are still there."
"In Ireland in the 1990s, the average age of a bride was 28 - now it is 36. People are definitely putting off the wedding day," she added.