UPDATE. The healthiest county in each Southern state: Rankin County, Mississippi

Healthiest County in Every State.  (24/7 Wall Street, 5/9/2017)

Part of the Jackson metro area, Rankin County is one of Mississippi's fastest growing.  Its population has increased 334% since 1960, compared to a 33.5% decrease in Holmes County, Mississippi's least healthy, since its 1940 peak. Rankin's nonwhite population is 25.4% compared to 84.7% in Holmes.

Source:  U.S. Census Bureau QuickFacts

Other numbers

% of population living in poverty

• Rankin County | 9.7%
• Holmes County | 44.3%
• Mississippi | 22.0%
• U.S.  13.5%

% of population 25 and older with bachelor's degree

• Rankin County | 29.0%
• Holmes County | 12.3%
• Mississippi | 20.7%
• U.S. | 29.8%

Median household income:

• Rankin County | $58,801
• Holmes County | $20,732
• Mississippi | $39,665
• U.S. | $53,889

Source:  Wikipedia

Other posts in series.
Shelby County, Alabama.  (5/10/2017)
Benton County, Arkasnsas.  (5/11/2017)
St. Johns County, Florida.  (5/12/2017)
Oconee County, Georgia.  (5/13/2017)
Oldham County, Kentucky.  (5/14/2017)
Cameron Parish, Louisiana.  (5/15/2017)

Original 4/4/2017 post starts here.

The least healthy counties in every state.  (24/7 Wall Street, 3/15/201\7)

Holmes County, Mississippi.   Its population is at the same now as it was during the Civil War.

Source:  Wikipedia

Source:  U.S. Census Bureau QuickFacts

Other numbers

% of population living in poverty

• Holmes County | 44.3%
• Mississippi | 22.0%
• U.S.  13.5%

% of population 25 and older with bachelor's degree

• Holmes County | 12.3%
• Mississippi | 20.7%
• U.S. | 29.8%

Median household income:

• Holmes County | $20,732
• Mississippi | $39,665
• U.S. | $53,889

Lexington Public Library.  (Lexington is the county seat.)

Related reading: 
Holmes County, Mississippi:  Largest slaveholders from 1860 slave census schedules and surname matches for African America on 1870 census. (Ancestry.com)

Other counties in series:

Wilcox County, Alabama.  (3/30/2017)
Phillips County, Arkansas.  (3/30/2017)
Gadsden County, Florida.  (3/31/2017)
Taliaferro County, Gerogia.  (3/31/2017)
Harlan County, Kentucky.  (4/3/2017)
Madison Parish, Louisiana.  (4/3/2017)

Related series:
The 10 most distressed cities in the U.S.
The 10 most prosperous cities in the U.S.