- Amateur Baseball Umpire's Association
- United States' largest membership association for amateur baseball umpires. Site presents a calendar of activities, clinic listings, forums, news, scores, and stories.
- American Federation of Umpires
- Organization's official site offering umpiring resources, event coverage, rookie resources, and contact information.
- California Baseball Umpires Association South Bay Unit
- Site provides downloadable forms, calendar of activities, board minutes, and information on goods, services, and board of directors.
- Eastern Maine Baseball Umpires Association Inc. (EMBUA)
- Provides umpires for middle and high schools in eastern Maine including the areas of Picataquis County, Penobscot County, Hancock County, and parts of Waldo County.
- Fox Valley Blues Umpires Association
- Umpires association operating in Northern Illinois, serving most of the Chicago metropolitan area. Provides services to high school conferences, collegiate programs, and summertime leagues and teams.
- National Umpires Association
- Offers assistance to local leagues in providing education on the rules and mechanics of baseball. Seeks to improve the quality of umpiring in games.
- New York State Baseball Umpires Association (NYSBUA)
- Official NYSBUA website provides information on officers and state committees and presents the association's bylaws and constitution.
- San Diego Adult Baseball Umpires
- Site features discussion boards, baseball rules flowcharts and quizzes, field directions, umpire schedules, and a list of umpires associations in San Diego County.
- San Diego County Baseball Umpires Association (SDCBUA)
- Aims to promote officiating and train new umpires who would serve in high school baseball games in San Diego.
- Santa Clara Valley Federation of Umpires
- Information on the federation's board of directors, meetings, game fees, policy, and umpire mechanics. With forms and reports.
- Staten Island Baseball Umpires Association
- Association's website features adult league news, interactive baseball rules, information on rule myths, and external links.
- Suburban Umpires Association, Inc.
- Provides comprehensive umpiring training classes and secondary insurance program for new officials.
- Washington County Umpire's Association
- Provides trainings for new and intermediate level umpires while offering new challenges to experienced officials.
- Western Maine Board of Baseball Umpires
- Presents meeting schedules, announcements, bylaws, discussion forums, exams and answers, and information on officers and committees.
- Western New York Umpires Association
- Information about the association's board of directors, meetings, history, officials, and committee and school appointments.
- Western Washington Baseball Umpires Association (WWBUA)
- Overview of the association with contact information, calendar of activities, ejection report, and related links.
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