Advertising Photographers of America, established in 1982, represents the interests of professional photographers, promotes the highest standards and ethics in the photographic and advertising community, provides educational resources, and fosters an environment conducive to achieving success in the industry.
http://www.apanational.com

American Society of Journalists and Authors, Inc. is the United States' leading organization of independent writers of magazine articles, trade books, and other forms of nonfiction writing.
http://www.asja.org

American Society of Media Photographers, Inc. was established in 1944 to protect and promote the interests of professional photographers who earn their living by making photographs for publication, and it is the world's leading organization of its kind.
www.asmp.org

Artists Rights Society represents the copyright permissions interests of visual artists in the United States and helps to protect members against illicit use of their works by pirates and copyright infringers.
www.arsny.com

The Authors Guild, Inc. which represents almost 8,000 published authors in many different genres, reviews members' publishing and agency contracts, intervenes in publishing disputes and lobbies on behalf of all authors.
www.authorsguild.org

The Dramatists Guild of America, Inc. is the only national professional association devoted to representing the interests of playwrights, composers and lyricists in the United States, and has over 6,000 members.
http://www.dramatistsguild.com

Garden Writers Association of America provides garden writers with authoritative information on writer's issues, new horticultural research and industry developments, distributes model contracts and provides legal assistance to members, and works to further the interests of members.
www.gwaa.org

Graphic Artists Guild is a national union of illustrators, designers, production artists and other creatives who have come together to pursue common goals, raise industry standards, and improve the ability of visual creators to achieve rewarding careers.
www.gag.org

Mystery Writers of America promotes and protects the interest and welfare of mystery writers, promotes literary recognition of the genre by sponsoring the Edgar Awards, encourages literacy and future readership, and advances the development of writers.
www.mysterywriters.org

National Association of Science Writers, Inc., founded in 1934, fosters exellence in science writing and the free flow of science information and promotes the professional interests of its approximately 2300 members.
www.nasw.org

The National Writers Union, the only union for freelance writers, advises members on contracts, represents members in grievances with the publishing industry and lobbies for legislation to strengthen authors' rights in copyright and other laws.
www.nwu.org

Novelists, Inc., a professional organization composed of over five hundred writers of popular fiction, provides professional advice to its writers, investigates new problems and issues and advocates for changes that are in the members' interests.
www.ninc.com

Romance Writers of America, Inc., the national association for authors who write romantic fiction, promotes the genre of romance to readers, booksellers, librarians and the media, and represents 2,800 published authors.
http://www.rwanational.org/

The Science Fiction and Fantasy Writers of America, Inc. is charged with informing science fiction and fantasy writers on professional matters, protecting their interests, and helping them deal effectively with agents, editors, anthologists and producers in non-print media.
http://www.sfwa.org/

Sisters In Crime was founded to combat discrimination against women in the mystery field, educate publishers and the general public as to inequities in the treatment of female authors, raise the level of awareness of their contribution to the field, and promote the professional advancement of women who write mysteries.
sistersincrime.org

Society of Children's Book Writers and Illustrators is the only organization in the country devoted to assisting and furthering the careers of children's book authors and illustrators.
http://www.scbwi.org/

The Society of Illustrators was founded in 1901 to promote the art of illustration: past, present and future. It is headquartered in an 1875 vintage carriage house on Manhattan's Upper East Side. The Museum presents exhibits year round in theme, juried and one-person shows. The Scholarship programs for college-level art students have awarded over $1.5 million since 1980. Other educational programs include lectures, an archives and career guidance.
http://www.societyillustrators.org/

Songwriters Guild of America was formed in 1931 to advance, promote and benefit the profession of songwriters or their estates through the collection of members' royalties from publishers, the auditing of writer accounts, notification and filing of members' copyright renewal applications, administration of members' publishing rights, and legal and legislative efforts.

Text and Academic Authors Association, Inc. supplies information to authors of text and academic material regarding their professional interests as authors and educators, protects their rights in areas of copyright and contracts, and promotes, coordinates and assists in improving the general working conditions of creators of academic intellectual property.
http://www.taaonline.net

Western Writers of America, Inc. is an organization of freelance writers of Western fiction and nonfiction who banded together to lift the standards of their products, gain more effective and widespread promotion and publicity and foster a greater understanding of the mutual problems and efforts of its members.
www.westernwriters.org