City, State Gap in life expectancy between highest and lowest zip codes (years) Average life expectancy (years)
Chicago, Ill.
30.1
77.3
Washington, D.C.
27.5
77.0
New York, N.Y.
27.4
80.6
Buffalo, N.Y.
25.8
74.8
New Orleans, La.
25.8
75.9
Jacksonville, Fla.
25.3
76.2
San Francisco, Calif.
25.0
82.1
Columbus, Ohio
24.8
77.0
Baltimore, Md.
24.7
73.5
Duluth, Minn.
24.2
79.0
data analysis includes the 500 most populous cities in the U.S.