L.A.'s income distribution is about the national average

That might seem surprising given the area's enormous levels of wealth and poverty, but a Census Bureau report shows that using an index that measures income inequality from zero to one - zero being the most equitable distribution and one being the least - L.A. County is near the middle, at 0.489. The national average is 0.467. NY County, which is Manhattan, weighs in at 0.601, third-highest in the country. The most inequitable county is East Carroll Parish, La., with 0.645. Index is based on Census data from 2006 to 2010 (h/t Economix).

Highest
East Carroll Parish, Louisiana. . . . . . . . . . . . . 0.645
Edwards County, Texas. . . . . . . . . . . . . . . . . . 0.626
New York County, New York. . . . . . . . . . . . . . . 0.601
Mineral County, Colorado . . . . . . . . . . . . . . . . 0.598
Pitkin County, Colorado. . . . . . . . . . . . . . . . . . 0.591
Allendale County, South Carolina. . . . . . . . . . 0.582
Greene County, Georgia. . . . . . . . . . . . . . . . . 0.564
Randolph County, Georgia . . . . . . . . . . . . . . . 0.558
Sioux County, North Dakota . . . . . . . . . . . . . . 0.556
Franklin County, Mississippi. . . . . . . . . . . . . . 0.555

Lowest
Manassas Park city, Virginia. . . . . . . . . . . . . . 0.339
Blaine County, Nebraska. . . . . . . . . . . . . . . . . 0.337
Kendall County, Illinois. . . . . . . . . . . . . . . . . . . 0.332
Craig County, Virginia . . . . . . . . . . . . . . . . . . . 0.327
Bath County, Virginia. . . . . . . . . . . . . . . . . . . . 0.326
Logan County, Nebraska. . . . . . . . . . . . . . . . . 0.314
San Juan County, Colorado. . . . . . . . . . . . . . . 0.313
McPherson County, Nebraska. . . . . . . . . . . . . 0.311
Kalawao County, Hawaii . . . . . . . . . . . . . . . . . 0.304
Loving County, Texas. . . . . . . . . . . . . . . . . . . . 0.207
Source: U.S. Census Bureau, 2006-2010 American Community Survey.