More than three quarters of voters say they support the introduction of same-sex marriage into the Irish constitution, a new RED C opinion poll has found.

According to the poll, carried out for RTÉ's Prime Time and the Sunday Business Post, just 19% of voters are opposed to its introduction.

The poll of over 1,000 people was carried out on Monday, Tuesday and Wednesday of this week and shows no change from a similar poll carried out last November.

It found that 76% of the electorate would vote in favour of allowing gay couples to legally wed in Ireland.

19% of voters said they were opposed to the introduction of same sex marriage while 5% of respondents were undecided.

80% of those polled said that people in same sex relationships should be able to have the same rights as traditional families, 41% said they had some reservations about adoption by gay couples.

49% of people said they believed in equal rights for gay people, but had some reservations about same-sex marriage.

41% of respondents said they believe those who oppose same sex marriage rights are homophobic while 59% disagreed.