And Romney made substantial gains among Catholics and Jews, two groups he targeted repeatedly during the campaign. Romney repeatedly highlighted a requirement under the president's healthcare plan that would require employers to purchase  plans that provided free contraception — despite objections from some Catholic groups — and sought a hard line on the issue of Iran.

Among White Catholics, Romney won nearly six out of every 10 voters, good for a seven-point swing from 2008. Romney only pulled three out of ever 10 Jewish voters, but that represented a nine-point improvement from McCain, who won only 21 percent of Jews.

Interestingly, Romney also saw a significant improvement among the religiously unaffiliated, improving five percentage points from 2008.

But President Obama's dominance among Hispanic voters, widely credited for aiding his reelection, was also reflected in the religious surrey. Among Hispanic Catholics, the president took three out of every four voters, improving three percentage points from his 2008 showing.

Some of the turnout problems that plagued Romney across the board were also evident in the religious survey. The number of white Protestant voters was down three percentage points from 2008, while the number of Catholics who voted was down two percentage points. Non-evangelical Christians were also down three percentage points.

It does appear, however, that the candidates were able to appeal to those with the strongest-held religious convictions. Among those who attend worship services more than once a week, turnout was up two percent, while weekly churchgoers also improved a percentage point from 2008.