September 21, 2012, 4:00 PM GMT+0

Democratic President Barack Obama holds a strong, 19-point lead over Republican challenger Mitt Romney in Massachusetts, 56% Obama to 37% Romney, in a poll of 899 registered voters statewide, conducted by YouGov.

In Massachusetts:

Partisan loyalty is strong on both sides, as 91% of Democrats are sticking with Obama and 93% of Republicans are voting for Romney.

Independents favor Obama, at 50%-41%.

Women and men favor Obama in Massachusetts, at 61%-33% and 51%-42% respectively.

Obama leads overwhelmingly in the Boston area by 72%-21%.

Obama also leads in Western Massachusetts (61%-32%), in the North Shore area (55%-38%) and in the Route 495/Industrial Belt area (56%-37%).

Romney leads Obama in South Shore/Cape Cod (54%-45%).

All age groups in Massachusetts favor Obama: age under 30s (61%-34%), age 30-44 (63%-30%), age 45-64 (51%-42%) and age 65 or older (53%-41%).

In the race for Senate, Democratic challenger Elizabeth Warren holds a nominal lead over incumbent Republican Senator Scott Brown, at 44%-43%.

Voters in Massachusetts are currently leaning decisively in favor of voting for Democratic candidates for the U.S. House, with 41% intending to vote for the Democratic candidate for the House in their district, and 24% for the Republican. However, 35% remain undecided in Massachusetts. The poll was conducted online September 7-14, 2012.

Sampling method: Respondents were selected from YouGov’s panel using sample matching. A random sample (stratified by age, gender, race, education, and region) was selected from the 2005–2007 American Community Study. Voter registration, turnout, religion, news interest, minor party identification, and non-placement on an ideology scale, were imputed from the 2008 Current Population Survey Registration and Voting supplement and the Pew Religion in American Life Survey. Matching respondents were selected from the YouGov panel, an opt-in Internet panel.

Weighting: The sample was weighted using propensity scores based on age, gender, race, education, news interest, voter registration, and non-placement on an ideology scale.

Number of respondents: 899 registered voters statewide.

Margin of error ± 3.6 (adjusted for weighting).

Click here for a complete report of results