Most Massachusetts voters are continuing to shun political party labels.

More than 53 percent of the state's 4.3 million registered voters are independent, having decided not to enroll as a Democrat or Republican.

According to numbers released by the state secretary's office on Tuesday, a little more than 35 percent of voters are registered as Democrats while fewer than 11 percent are registered Republicans.

Suffolk County, which includes Boston, continues to be the most heavily Democratic county, with more than 53 percent of voters registered Democrats.

Barnstable County has the highest concentration of Republicans, who make up nearly 16 percent of registered voters.

Middlesex, the state's most populous county with 970,000 voters, has more than 36 percent Democratic voters and fewer than 10 percent Republican.

Election Day is Nov. 4.