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US Distribution of Active Stallions and Mares Bred
For the year: 2010
State by
Ranking
Mares
Bred
Stallions Avg.
Book
Kentucky17,46029958.4
Louisiana3,50627712.7
Florida3,28217019.3
California2,80924111.7
Pennsylvania1,68112813.1

Oklahoma1,4961858.1
Texas1,4742476.0
New Mexico1,4681728.5
New York1,3606520.9
Indiana1,1791229.7

West Virginia7407410.0
Maryland5783516.5
Illinois565807.1
Washington503578.8
Arkansas422469.2

Arizona349536.6
Oregon240259.6
Michigan214444.9
Minnesota201267.7
Iowa177266.8

Idaho173335.2
New Jersey160237.0
Kansas154295.3
Nebraska151246.3
Colorado149314.8

Ohio137314.4
South Dakota1211210.1
North Dakota107195.6
South Carolina91243.8
Virginia89322.8

Utah86243.6
Montana79292.7
Georgia77155.1
Alabama76184.2
Tennessee55153.7

Massachusetts51143.6
North Carolina50133.8
Missouri3694.0
Mississippi2673.7
Wisconsin1635.3

Nevada1252.4
Wyoming1252.4
Delaware212.0
New Hampshire221.0
Vermont212.0

Total41,6182,79114.9

States ranked by number of mares bred. Mares bred to two stallions in the same breeding season are counted twice.

Source: The Jockey Club