Seth Moulton

Rep. Seth Moulton won 12 municipalities across Massachusetts in his primary loss to Sen. Ed Markey.

Sen. Ed Markey prevailed over his opponent, Rep. Seth Moulton this week in the state’s closely-watched Democratic Senate primary.

The race was not very close in the end. Markey triumphed with 64.8 percent of the vote, compared to Moulton’s 35.2 percent, according to AP results. Markey received more than 573,000 votes, while Moulton received about 311,000.

Given the lopsided results, how many municipalities did Moulton actually win? Only 12: Boxford, Dover, Essex, Hamilton, Lynnfield, Manchester-by-the-Sea, Marblehead, Newbury, Topsfield, Wellesley, Wenham, and West Newbury.

The community where Moulton won the largest share was Marblehead, where he grew up — he received 60.7 percent of the vote there. He didn’t crack 55 percent of the vote in any of the other municipalities.

Moulton has represented Massachusetts’s 6th congressional district, which encompasses the entire North Shore, since 2015. Most of the communities he won are contained in that district, with the exception of Dover and Wellesley.

In Salem, where Moulton lives, Markey won with 66.6 percent of the vote.

Many of the communities that voted for Moulton are among the wealthiest in the state. The average annual income per capita of those 12 municipalities is $126,843.25, according to data from the state.

Moulton, 47, ran on a platform on generational change, arguing that the 80-year-old Markey should step aside. But Markey turned the race into one that hinged on ideology, successfully portraying himself as the more progressive candidate.