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US Distribution of Active Stallions and Mares Bred
For the year: 2015
State by
Ranking
Mares
Bred
Stallions Avg.
Book
Kentucky17,62622777.6
Florida3,05714521.1
California2,71317615.4
Louisiana1,76614911.9
New York1,5986723.9

New Mexico9861099.0
Oklahoma8781038.5
Texas8391336.3
Maryland8014119.5
West Virginia7165812.3

Pennsylvania7086011.8
Indiana531658.2
Arkansas3984010.0
Ohio381517.5
Washington368409.2

Illinois296535.6
Colorado183365.1
Minnesota153198.1
Oregon134168.4
Arizona129216.1

Michigan125264.8
Iowa103234.5
Idaho102263.9
North Dakota101175.9
Nebraska93185.2

South Dakota81711.6
South Carolina72164.5
New Jersey48114.4
Virginia47172.8
Alabama45143.2

Montana42133.2
Tennessee37113.4
Missouri3694.0
Utah35113.2
Kansas30103.0

Wyoming1644.0
Wisconsin1133.7
Mississippi951.8
North Carolina942.3
Maine515.0

Massachusetts522.5
Georgia321.5
Nevada221.0

Total35,3181,86119.0

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

Source: The Jockey Club