PR consultancies

Most of the largest PR companies are owned by international conglomerates. The biggest five (with HQ location) are, WPP(UK), Omnicom(US), Interpublic(US), Publicis(France) and Havas(France).
== List of PR firms ==
*5W Public Relations
*Academic Network LLC
*Adam Smith International
*Advocacy Ink
*Ailes Communications
*Aker Partners
*Aman & Associates
*APCO Worldwide
*Bader-Rutter
*B&C Associates
*Barbour Griffith and Rogers
*Benador Associates
*Bell Pottinger Public Affairs
* Berman & Co.
*Brown Lloyd James
*Brucato & Halliday
*Burson-Marsteller
*Butera Andrews
*CARMA International
*Cassidy & Associates
*Catalina Marketing Corporation
*Chandler Chicco Agency
*Chrome Consulting
*Circulation ExpertÃƒÆ’Ã‚Â­
*Citigate Dewe Rogerson
*CLS
*ClarkeGoward
*Clark & Weinstock
*Colle & McVoy
*Cone
*Connors Communications
*Consolidated Communications
*Corporate Communications
*Countrywide Porter Novelli
*Creative Response Concepts
*Cubitt Consulting
*D.C. Navigators
*Dave Barrows & Associates
*DCI Group
*Decision Management
*Dezenhall Resources
*Diermeier Consulting
*Dittus Communications
*Direct Impact
*Dolphin Group
*eNR Services
*ePublic Relations
*Eamon Bates Europe
*E. Bruce Harrison Company
*Ecos Corporation
*Edelman
*EQ Management
*Equals Three Communications
*Euro RSCG
*Faraone Communications
*Fenn Communications
*Fenton Communications
*Firedog Public Relations & Marketing
*Fishburn Hedges
*Fleishman-Hillard
*Freud Communications
*Gavin Anderson & Company
*GCI
*GC Strategic Advocacy
*Gehrung Associates
*Glover Park Group
*GMMB
*Golin Harris
*Gordon C. James Public Relations
*Gordon Reyes and Company
*Graham Williams Group
*Gray and Company
*Grassroots Enterprise, Inc.
*GreenTree Communications
*Hardiman Consulting
*Harrison Consulting
*HealthSTAR Public Relations
*Hill & Knowlton
*Home Front Communications
*Icon Communications
*International Trade and Development Agency
*Iraq Policy Information Project (IPIP)
*Issue Dynamics
*Jackson Wells Morris
*James S. Denton Consulting
*James Savarese and Associates
*Jefferson Waterman International
*Jericho Communications
*JohnstonWells
*Kamber Group
*Dan Klores Communications
*Kekst and Company
*Kestrel Communications Ltd
*Ketchum
*LCO
*Levick Strategic Communications
*Lincoln Group
*LOGOS Consulting Group
*Luther Pendragon
*MacWilliams, Robinson & Partner
*ManattJones
*Manning Selvage & Lee
*Matthews Media Group
*McCahill Communications
*McCarthy Marcus Hennings
*McRae Agency
*MCM Research
*Medialink Worldwide
*MGP & Associates PR
*Michels Warren
*Mike Vasilinda Productions
*Mongoven, Biscoe & Duchin
*Mosaic Reputation Management 
*Moss Creative
*National Public Relations
*NettResults
*North American Network, Inc.
*NYPR
*OneWorld Communications
*Padilla Speer Beardsley
*Pagan Communications
*Pagan International
*Placebrands
*Policy Communications
*Porter Novelli International
*Potomac Communications Group
*Public Strategies, Inc.
*Purple Communications
*Read-Poland Associates 
*Reason, Inc.
*Regester Larkin
*Rendon Group
*Reputation Measurement
*Ripple Strategies
*Rock Creek Creative
*Rubenstein Associates, Inc.
*Ruder Finn
*Russo Marsh and Rogers
*SheaHedges Group
*Smith & Harroff
*Smithfield Financial
*Spaeth Communications
*Spector & Associates
*State Affairs Company
*Sterling International Consulting Corporation
*Stratacomm
*Strategic Communication Laboratories
*Sugerman Communications Group
*Susan Davis International
*Tele-Press Associates
*Text 100
*The Biegel Group
*The Bivings Group
*The Dittus Group
*The Livingston Group
*The Lukaszewski Group
*The Maitland Consultancy
*The Moriah Group
*The NewsMarket
*The PBN Company
*The Showalter Group
*The Spa Way
*TheWadeGroup
*Tonic Life Communications
*Van Kloberg & Associates
*Waggener Edstrom
*Washington Network Group
*Weber Shandwick
*White House Writers Group
*Widmeyer Communications
*Wilson-Miller Communications
*Wood Communications
*World Monitors Inc.
*Xenophon Strategies
In 2001, the largest PR firms by revenue were:
*Weber Shandwick Worldwide $426,572,018
*Fleishman-Hillard Inc. $345,098,241
*Hill and Knowlton, Inc. $325,119,000
*Incepta (Citigate) $266,018,371
*Burson-Marsteller $259,112,000
*Edelman Public Relations Worldwide $223,708,535
*Ketchum, Inc. $185,221,000
*Porter Novelli $179,294,000
*GCI Group/APCO Worldwide $151,081,645
*Ogilvy Public Relations Worldwide $145,949,285