A majority of Florida voters support gay marriage.

According to a Quinnipiac University Poll of 1,413 registered voters conducted during the last week of April and released Friday, 56 percent of Floridians support allowing gay and lesbian couples to marry, while 39 percent remain opposed.

Support is highest among Democrats (65%), followed by independents (64%). A large majority of Republicans (64%) remain opposed, with 32 percent in favor.

Every age group supports marriage equality except voters over 65 years old, a plurality (49%) of whom remain opposed.

Comparing Friday's poll to a September, 2012 Washington Post poll, support has increased 2 percentage points, from 54 to 56 percent, but opposition has also increased, from 33 to 39 percent.

On Thursday, six gay couples represented by Equality Florida asked a state court to declare the state's marriage ban to be unconstitutional.

(Related: Six gay couples challenge Florida's gay marriage ban.)