Comstrat
- A full-service advertising and integrated communications and multimedia agency.
- http://www.comstrat.biz

Covenant Professional Services
- A full-service minority owned and operated marketing and advertising firm providing services tailored for non-profit organizations, corporations, small businesses and religious organizations.
- http://www.covenantlink.faithweb.com

Catch Light Productions
- Full service creative marketing firm utilizing the hub agency structure of independent specialists.
- http://www.catchlight.com

CoActive Marketing Group Inc
- Develops and implements customized consumer and trade promotion programs principally for fortune five-hundred consumer product manufacturers and service providers. (Nasdaq: CMKG).
- http://www.coactivemarketing.com/

The Cyphers Agency, Inc
- Full service agency in Annapolis, Maryland, guiding the marketing efforts of consumer and business-to-business concerns. Staff profiles, case studies, and portfolio.
- http://thecyphersagency.com/

Culmei Productions
- A full service advertising agency marketing the independent owner/operator businesses for radio and television.
- http://www.culmei.com/

Catalpha Advertising and Design
- Specializing in creating integrated marketing solutions for corporations, institutions and non-profit clients. (Baltimore MD.- USA)
- http://www.catalpha.com/

Creative Force
- Provides advertising services including logo and trademark development, graphic design, public relations and sales promotions.
- http://www.creative-force.com/

Creative Image Advertising and Design, Inc.
- Full range of advertising and graphic design services, printing and mailing fulfillment.
- http://www.ecreativeimage.com/

Creative Communication & Design
- A full service marketing, advertising and public relations company located in Wausau, Wisconsin.
- http://www.creativecommunication.com/

Cramp+Tate, Inc.
- A full service advertising agency.
- http://www.cramp.com/

Creative Solutions - Innovative Direct
- Offering integrated online and offline direct response advertising services.
- http://www.creative-solution.com/

The College Street Group
- Specializing in marketing and communications for higher education institutions.
- http://www.collegestreet.com/

Coudal Partners
- An advertising, design, and interactive firm, located in Chicago.
- http://www.coudal.com/

Collaborate Communications, Inc.
- A communications agency whose services include brand, creative, and integrated communications development.
- http://www.collaboratesf.com/

Creative Consultants
- A full service advertising marketing and design agency that specializes in assisting regional and national clients.
- http://www.creativeconsultants.com/

Campbell-Ewald
- Fully integrated advertising and marketing communications services.
- http://www.campbell-ewald.com/

CTS Ad Agents
- We are a group of retail advertising and marketing agents. Create your own team to suit you specific advertising dilemma.
- http://www.ctsadagents.com/

Cronin and Company
- A full service marketing communications company.
- http://www.cronin-co.com/

Creativworks
- Advertising and marketing agency.
- http://www.creativworks.com/

Creative Resources Advertising
- We provide effective turn-key sales support through creative campaign strategy and attention getting graphic design.
- http://www.cra-online.com/

Creative Talents Agency
- Full service advertising, promotions, graphic production, and special events company.
- http://www.cta1.com/

Creative Alliance
- A full service advertising and marketing communications agency.
- http://www.cre8.com/

Cossette Communication Group
- An advertising agency offering communication and marketing services in advertising, public relations, graphic design, promotions and new media.
- http://www.cossette.com/

Creative Genius Communications
- Full service advertising agency based in Ottawa, Ontario, specializing in providing a wide range of marketing, communication and graphic design services to small and mid-sized firms.
- http://www.creativegenius.ca/

Conaway Brown
- Committed to the needs of our clients and the advancement of advertising through innovation and design.
- http://www.conawaybrown.com/

Calder Bateman Communications
- Public relations, issues management, advertising and brand management strategies.
- http://www.calderbateman.com/

Cashman & Katz Integrated Communications
- A full service, integrated communications agency with strengths in superior account service.
- http://www.cashman-katz.com/

Catalyst Marketing Innovations, LLC
- Full service marketing based solutions including political campaigns and product marketing.
- http://www.catalyst-marketing.com/