Communities with the lowest median income

4. Chelsea

2009 median income: $44,507
1999 median income: $41,448
1989 median income: $50,237
1979 median income: $42,864
30-year change: 3.8 percent

Fun Fact: Chelsea is the smallest city in Massachusetts by land area.

Pictured: A 1905 postcard showing Soldiers' Monument in Chelsea.