• Tennis and Racquet Sports Clubs/Leagues

• 1900.

Marshfield Tennis Club

The Marshfield Tennis Club is a registered 501(c)4 non-profit and USTA Community Tennis Association member.

• Promotion of Business (Chambers of Commerce)

• 1901.

US Super Yacht Association Inc

Working to promote the superyacht industry of the United States and to serve as its voice.

• Women's Service Clubs

• 1902.

Island Estates Womens Club Charitable Trust

The IEWC, founded in 1961, is dedicated to friendship, community service, charitable giving, educational enrichment and social activities.

• Baseball, Softball (includes Little Leagues)

• 1903.

Heritage Harbour Baseball Inc

For all questions and support, visit: https://help.

• Boys Clubs

• 1904.

Boys & Girls Clubs of Northwest San Diego County Foundation

BGC San Dieguito and BGC Oceanside have merged to create Boys & Girls Clubs of Northwest San Diego.

• History Museums

• 1905.

Sitka Maritime Heritage Society Inc

We are dedicated to preserving Sitka's rich maritime heritage and educating the public about it.

• Student Services and Organizations

• 1906.

Blue Ocean Student Entrepreneurs Corp

The Blue Ocean Student Entrepreneur Competition exposes high school students to business in an engaging, interesting, creative, and applicable way The largest and most prestigious virtual pitch competition for high school students in the world Blue Ocean Student Entrepreneur Competition The 2025 competition is now closed and the judging process has begun.

• Environmental Education and Outdoor Survival Programs

• 1907.

OCEANSWIDE INC

Our programs give students hands-on maritime experience with guidance from educators, research scientists, archeologists, and historians.

FLORIDA OCEANOGRAPHIC SOCIETY INC

Secondary Menu Home Visit the Coastal Center Our Advocacy Efforts Research Conservation Visit the Coastal Center Become A Member Volunteer About Us Florida Oceanographic Society is a nonprofit organization founded in 1964 with the mission to inspire environmental stewardship of Floridas coastal ecosystems through educationresearch and advocacy.