The count showed Obama with 66 percent of the vote to Clinton's 33 percent in the race for Colorado's 71 delegates.

Romney won on the Republican side with 59 percent of the vote to John McCain's 19 percent. The winner will add 46 delegates to his total.

The Denver Post reported heavy turnout in the metro region and plenty of confusion among voters who didn't know where the caucuses were taking place and mistakenly thought they could show up at their regular polling places.