BALTIMORE—A new poll says most voters in Maryland support some form of legalized same sex unions.

The poll for The (Baltimore) Sun by Annapolis-based Opinionworks shows 19 percent of likely voters support gay marriage and 39 percent support civil unions. Thirty-one percent of those polled oppose either form of same-sex unions and 11 percent either weren’t sure or did not answer.

Gay-rights activists want state lawmakers to pass a marriage bill. Gov. Martin O’Malley and Maryland House Speaker Michael E. Busch have endorsed civil unions, but Senate President Mike Miller opposes both civil unions and same-sex marriage.

The telephone poll of 904 voters was conducted Jan. 6-9. It has a margin of error of 3.5 percentage points.