Montana

The bluest county in Montana is Glacier County, where Obama won 64.9% of the county’s 2012 vote. While the county voted for Obama in the presidential election, it sent a Republican to the U.S. House of Representatives in each of the last five congressional elections. From 2009 through 2013, the county’s median household income was $33,519, much lower than the national median of $53,046 over the same period. In addition, more than 33.7% of Glacier County residents lived in poverty, more than double the national poverty rate of 15.4%.

Nebraska

The bluest county in Nebraska is Lancaster County, where Obama won 48.7% of the county’s 2012 vote. Despite Romney winning the county, the percentage of adults voting for Obama was the highest compared to any other county in the state. Unlike other predominantly Democratic areas, the county was more than 88% white, and residents had a median household income of $51,574. By comparison, 74% of Americans were white and the national median household income was $53,046.

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Nevada

Obama won 56.4% of the votes in Clark County. While the county has helped elect both Democrats and Republicans to the U.S. Senate, it has sent only Democrats to the U.S. House of Representatives over the last 10 years. Unlike the bluest county in most states, Clark County adults have a relatively low college attainment rate, with 22.1% having attained at least a bachelor’s degree.

New Hampshire

Obama won 61.7% of the votes in Cheshire County, and is the bluest county in New Hampshire. While some of the bluest counties in each state have overwhelmingly voted for Democrats to represent them in the House and Senate, Cheshire County has been more even in its representation. The county has sent both Democrats and Republicans to the House over the last 10 years. A Democrat now occupies the seat.

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New Jersey

Obama won 77.4% of the votes in Essex County, the highest share of any county in New Jersey. Although voters sent a Democrat to the White House, they sent a Republican to the U.S. House of Representatives in each of the last five congressional elections. From 2009 through 2013, the county’s median household income was $55,095, higher than the national median of $53,046 over the same period. However, the county’s median income was far lower than the state’s $71,629.