Sixty-one percent of California voters say they support same-sex marriage, compared to the 48 percent who opposed Proposition 8 in 2008 and only 28-percent backed gay marriage in 1977.
Mark DiCamillo with the Field Poll says the statistics don't surprise him.
He says the poll shows a generational trend.
DiCamillo: "As the population of baby boomers ages they're replacing people older than them, who held somewhat less tolerant views about same sex marriage, so I would expect this actually to continue."
Support for gay marriage crosses all gender and ethnic groups, and all geographic regions of the state.
Republicans and conservatives are the only groups whose majorities oppose gay marriage.
Six in ten voters say the upcoming U-S Supreme Court ruling on Prop 8 is important.