1. These Herfindahl-Hirschman Index(HHI) numbers resulted from sorting the counties from 

smallest to largest HHI and then summing the milk production numbers to comprise 25% of total 

milk pooled on Federal Milk Orders. The last county’s HHI to total at least 25% is reported in the 

“Largest HHI” column.

2. Share of milk pooled on Federal Milk Orders from counties within the region with an HHI equal 

to or less than shown in the column titled “Largest HHI”.

3. In the Northwest and Southwest milksheds, the requested 25% share of milk pooled was 

achieved while omitting counties that are restricted due to fewer than three handlers procuring 

milk. 

Table 1 

Largest County-Level Herfindahl-Hirschman Index by Milkshed1 

December 2008 

Milkshed Name Largest HHI Share2

Central 0.44 25.42%

Mideast 0.31 25.07%

Northeast 0.24 26.20%

Northwest3>0.50 28.31%

Southeast 0.48 25.03%

Southwest3>0.50 25.11%

Upper Midwest 0.15 27.64%

Prepared by:

 Market Administrator’s Office 

 Minneapolis, Minnesota 

 March 2011 
Table 2 

Central Milkshed Counties with Lowest HHI Comprising 25% of Milk Pooled on Federal 

Orders 

December 2008 

State County

Illinois Whiteside

Iowa Allamakee

Iowa Buchanan

Iowa Cedar

Iowa Chickasaw

Iowa Clayton

Iowa Delaware

Iowa Dubuque

Iowa Fayette

Iowa Jackson

Iowa Johnson

Iowa Linn

Iowa Lyon

Iowa Sioux

Iowa Washington

Minnesota Lincoln

Minnesota Pipestone

Missouri Benton 

Missouri Franklin

Missouri Morgan 

Nebraska Cedar

Oklahoma Craig

Oklahoma Tillman

South Dakota Davison

South Dakota Hanson

South Dakota Union

South Dakota Yankton

Wisconsin Crawford

Wisconsin Grant

Prepared by:

 Market Administrator’s Office 

 Minneapolis, Minnesota 

 March 2011 
Table 3 

Mideast Milkshed Counties with Lowest HHI Comprising 25% of Milk Pooled on Federal 

Orders 

December 2008 

State County

Indiana Elkhart

Indiana Noble

Indiana Wayne

Maryland Garrett 

Michigan Allegan

Michigan Barry

Michigan Ionia

Michigan Kalamazoo

Michigan Montcalm

Michigan Ogemaw

Ohio Carroll

Ohio Columbiana

Ohio Highland

Ohio Holmes

Ohio Huron 

Ohio Knox

Ohio Mahoning

Ohio Paulding

Ohio Richland

Ohio Stark

Ohio Tuscarawas

Ohio Wayne

Pennsylvania Armstrong

Pennsylvania Butler

Pennsylvania Fayette

Pennsylvania Lawrence

Pennsylvania Mercer

Pennsylvania Washington

Pennsylvania Westmoreland

Prepared by:

 Market Administrator’s Office 

 Minneapolis, Minnesota 

 March 2011 
Table 4 

Northeast Milkshed Counties with Lowest HHI Comprising 25% of Milk Pooled on Federal 

Orders 

December 2008 

State County

New York Herkimer

New York Livingston

New York Montgomery

New York Wayne

New York Wyoming 

Pennsylvania Berks

Pennsylvania Bradford

Pennsylvania Chester

Pennsylvania Cumberland

Pennsylvania Juniata

Pennsylvania Lancaster

Pennsylvania Perry

Pennsylvania Somerset

Pennsylvania Susquehanna 

Pennsylvania York

Prepared by:

 Market Administrator’s Office 

 Minneapolis, Minnesota 

 March 2011 
Table 5 

Northwest Milkshed Counties with Lowest HHI Comprising 25% of Milk Pooled on Federal 

Orders 

December 2008 

State County

Oregon Marion

Oregon Washington

Oregon Linn

Washington Clark

Washington King

Washington Lewis

Washington Yakima

Prepared by:

 Market Administrator’s Office 

 Minneapolis, Minnesota 

 March 2011 
Table 6 

Southeast Milkshed Counties with Lowest HHI Comprising 25% of Milk Pooled on Federal 

Orders 

December 2008 

State County

Arkansas Benton

Arkansas Carroll

Georgia Hall

Georgia Jefferson

Georgia Morgan

Indiana Daviess

Indiana Dubois

Kentucky Adair

Kentucky Barren

Kentucky Christian

Kentucky Graves

Kentucky Green

Kentucky Hardin

Kentucky Hart

Kentucky Metcalfe

Kentucky Simpson

Kentucky Taylor

Kentucky Todd

Kentucky Warren

Missouri Barry

Missouri Christian

Missouri Howell

Missouri Jasper

Missouri Laclede

Missouri Lawrence

Missouri Newton

Missouri Stone

Missouri Webster

North Carolina Alexander

North Carolina Alleghany

North Carolina Cleveland

North Carolina Davie

North Carolina Guilford

North Carolina Iredell

North Carolina Randolph

North Carolina Rowan

North Carolina Yadkin
South Carolina Orangeburg

Tennessee Cocke

Tennessee Cumberland

Tennessee Giles

Tennessee Henry

Tennessee Lawrence

Tennessee Marshall

Tennessee Maury

Tennessee Robertson

Tennessee Rutherford

Tennessee White

Virginia Appomattox 

Virginia Bedford 

Virginia Culpeper 

Virginia Floyd 

Virginia Franklin 

Virginia Grayson 

Virginia Harrisonburg 

Virginia Montgomery 

Virginia Rockbridge 

Virginia Smyth 

Virginia Washington

Virginia Wythe 

Prepared by:

 Market Administrator’s Office 

 Minneapolis, Minnesota 

 March 2011 
Table 7 

Southwest Milkshed Counties with Lowest HHI Comprising 25% of Milk Pooled on 

Federal Orders 

December 2008 

State County

Texas Bailey

Texas Castro

Texas Comanche

Texas Erath

Texas Hamilton

Texas Lamb

Texas Parmer

Prepared by:

 Market Administrator’s Office 

 Minneapolis, Minnesota 

 March 2011 
Table 8 

Upper Midwest Milkshed Counties with Lowest HHI Comprising 25% of Milk Pooled on 

Federal Orders 

December 2008

State County

Wisconsin Brown

Wisconsin Calumet

Wisconsin Clark

Wisconsin Dodge

Wisconsin Door

Wisconsin Fond Du Lac

Wisconsin Green

Wisconsin Lafayette

Wisconsin Marathon

Wisconsin Shawano

Wisconsin Sheboygan

Wisconsin Vernon

Wisconsin Waupaca

Prepared by:

 Market Administrator’s Office 

 Minneapolis, Minnesota 

 March 2011