The Amateur Baseball Umpires' Association provides training for aspiring baseball umpires.

200 South Wilcox Street, #508
Castle Rock, CO 80104-1913
Tel: (303) 290-7411
Tel: (866) 332-3492
Email: info@umpire.org
https://www.umpire.org

The International Association of Approved Basketball Officials provides information on training schools, requirements, and other information for becoming a basketball official.

PO Box 355
Carlisle, PA 17013-0355
Tel: (717) 713-8129
http://www.iaabo.org

John Skilton's Baseball Links offers links to amateur and professional baseball umpiring associations throughout the world.

http://www.baseball-links.com

This Web site provides information about umpire training schools and career-related resources.

245 Park Avenue, 34th Floor
New York, NY 10167-0002
Tel: (212) 931-7537
Email: mlbumpirecamps@mlb.com
http://mlb.mlb.com/mlb/official_info/umpires/camp/about_us.jsp

This Web site offers a wealth of information on baseball umpiring, including how to become an umpire, and rules and measurements of the game.

https://www.mlb.com/official-information/umpires

The Minor League Baseball Umpire Training Academy offers training programs in minor league baseball officiating.

9550 16th St. No.
St. Petersburg, FL 33716-4217
Tel: (877) 799-8677
Fax: (727) 456-1745
Email: Info@MiLBUmpireAcademy.com
https://www.milbumpireacademy.com

The National Association of Sports Officials provides information on how to become a sports official in various sports and offers a wide variety of officiating training publications and videos.

2017 Lathrop Avenue
Racine, WI 53405-3758
Tel: (262) 632-5448
Fax: (262) 632-5460
Email: customerservice@naso.org
https://www.naso.org

The Wendelstedt School for Umpires is recognized by Major League Baseball for the Umpire Development Program.

88 S. St. Andrews Dr.
Ormond Beach, FL 32174-3857
Tel: (800) 818-1690
https://www.umpireschool.com