Hadley Green Advertising
- Seattle based advertising agency specializing in creative concepts.
- http://www.hadleygreen.com

Howard & Frost Advertising Communications
- A Seattle-based firm specializing in branding, strategic marketing, and print advertising.
- http://www.hofro.com/

Holberg Design
- A full service advertising agency providing creative marketing, public relations, web development and graphic design services.
- http://www.holbergdesign.com/

Heil Brice Retail Advertising
- Full service advertising agency.
- http://www.hbra.com/

The Howard Marketing Communications Company
- A full service marketing communications company.
- http://www.howardintegrated.com/

The Halo Group
- Creative marketing communications company, based in Long Island NY, serving national, international and regional clients.
- http://www.thehalogroup.net/

Haviland Communications, Inc.
- A full service advertising, public relations and investor relations agency.
- http://www.havcom.com/

Hanson Marketing & Advertising
- Advertising agency specializing in media buying, creative writing, and customer retention.
- http://www.adsthatsell.com/

Hanna Advertising
- Full service advertising and marketing agency.
- http://www.hanna-advertising.com/

Hellman Associates
- Marketing and advertising agency with national and international clients, specializing in conception through completion campaigns and project marketing.
- http://www.hellman.com/

Heavy Creative
- Provides print, television, consumer & Internet advertising.
- http://www.heavycreative.com

Hadfield Communications
- Full service advertising agency located in Houston, Texas. Specializes in advertising and marketing for the food industry, as well as being a full service agency for other sectors.
- http://www.hadfield.net

Herbert Holden Slater and Beim
- Advertising agency based in San Francisco/San Mateo area.
- http://www.adsthatwork.com/

Herndon Associates
- A multi-disciplinary advertising and marketing communications agency, delivering superior integrated communication programs that advance our client's business objectives.
- http://www.herndonassociates.com/

Hensley Segal Rentschler Inc.
- International integrated marketing communications advertising agency.
- http://www.hsr.com/

Hugh Salmon & Partners
- Full service UK advertising agency.
- http://www.hughsalmon.com/

Henke and Associates, Inc.
- A creative marketing, advertising and solutions agency.
- http://www.henkeandassoc.com/