Top 25 PR Agencies By Size

top pr agencies by size

Public Relations firms are being created each day. However, when a new agency is formed – the headcount of the PR company tends to be on the smaller size.

Sometimes a PR campaign needs a large staff to get off the ground. That is where large PR companies come into play.

Research performed by O’dwyers – broke down the largest PR firms based on size.

Here are the United States 25 largest PR agencies by size:


Learning from the Edelman Earned Brand Study

A global communications firm that was founded back in 1952, with offices all over the world, and about 6,000 employees, Edelman works to help companies evolve, promote, and protect their reputations and brands. Ever since it was founded, the firm has received numerous awards, in large part because of its great work with services such as business marketing, corporate reputation, executive positioning, media relations, and many others.

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Real Chemistry

Founded in 2001, Real Chemistry is a global health innovation company with almost 1,700 industry professionals along with hundreds of clients and partners. Over the last two decades, the company has been working hard to combine technology, data, and creativity to address many healthcare challenges around the world. With services like branding, integrated communications, advertising, and more. Real Chemistry has built a perfect place for the collaboration of the best health experts.

Apco Worldwide Profile

APCO Worldwide

With headquarters in Asia, Europe, and North America, APCO Worldwide is an advisory and advocacy communications consultancy that was founded in 1984. This is a consultancy that helps plan, execute, as well as secure impact for clients and partners. They do so through services such as marketing communication, research strategy and measurement, media relations and training creative, corporate communication, and many others.

Finn Partners: Profile

Finn Partners

With offices all over the globe, Finn Partners is a global integrated marketing agency that’s been around for a decade, providing clients with breakthrough campaigns, powered by creativity, strategy, and purpose. The agency is able to deliver excellent results through services such as advertising, corporate reputation, crisis communications, public affairs, media relations, research and insights, thought leadership, integrated marketing, and plenty more.



ICR is a public relations and communications firm founded in 1998, and partners with companies to execute strategic communications and advisory programs to achieve business goals and build credibility and awareness. Offering services such as public relations, transactions, and special situations, digital branding, creative services, and of course, communications and public relations services, means clients can receive incredible results.

Profile of Ruder Finn

Ruder Finn Inc.

A global communications and creative agency, Ruder Finn Inc was founded in 1948 and has been working to define and redefine public relations throughout its lifetime. Between public relations, social media, community building, experiential marketing, crisis and issues management, and a number of other services, Ruder Finn Inc has been able to push the boundaries of innovation and create genuine connections around the world.

Profile of ZENO Group

Zeno Group

Founded in 1998, Zeno Group is a global integrated communications agency that also works in public relations. By bringing top talent to clients, the agency is able to smartly and effectively utilize the power of strategic communications. Zeno Group provides clients with services like digital marketing, creative, content, strategic planning and insights, corporate, and plenty others.

Profile of Prosek Partners

Prosek Partners

Prosek Partners is a public relations firm that was founded in 1995 and offers its services and capabilities internationally. Through a combination of passion, creativity, and marketing savvy, clients in the business-to-business and financial industries are able to thrive when working with the firm. Prosek Partners’ services include media relations, integrated marketing, corporate communications, crisis and issues communications, and more.

Hotwire PR Profile


The global tech communications consultancy Hotwire was founded in 2000 and has offices in many locations around the world. The company works to help clients engage and connect to their consumers in better ways through web development, design, digital, content and social media marketing, research and insight, public affairs, media relations, and other services.


Founded in 1986, MWWPR is an integrated public relations agency that works with the industry’s best strategic thinkers, hybrid creatives, innovative players, and technicians. With services that range from executive eminence, corporate communications, consumer marketing, public affairs, crisis communications, and issues management, this is an agency that is committed to making every client matter.

5W Public Relations

Based in New York City, and founded in 2003, 5W Public Relations is a full-service public relations agency that works with established and emerging brands, corporations, companies, businesses, and individuals to help them both define and achieve their strategic goals in PR. From integrated marketing, strategic planning, and public relations, to reputation management, product integration, event management, and other services, this is a top PR agency that can provide each client with what they need.

imre, LLC

An integrated marketing and communications agency, imre, LLC has offices all over the United States. This is an agency that offers many beneficial services to its clients that help achieve their business goals, such as brand strategy, digital marketing, social media, data and analytics, public relations and media, and creative,.

Profile of Padilla PR


Founded in 1961, Padilla is public relations and communications company that has offices across the United States and helps clients build, grow and protect their brands and reputations. The company provides brands and corporations around the globe with capabilities such as brand strategy, marketing communication, advertising, marketing technology, media relations, measurement and analytics, insights and strategy, social media, public relations, and many others.


For nearly two decades, the strategic communications and public affairs firm Kivvit has been helping companies create impactful strategies, maximize results and achieve their goals. With services such as public affairs and issues advocacy, media and public relations, research and data analytics, reputation management, executive positioning, and plenty more, Kivvit has received numerous awards in its lifetime.

French/West/Vaughan Profile


The public affairs, advertising, and digital media agency French/West/Vaughan was founded in 1997 and has been the Southeast’s leading agency since 2001. Providing clients with services such as issues management and crisis counseling, social media, public affairs, advertising, and digital marketing, the agency has received over 1,100 PR, advertising, and digital marketing awards.

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Spectrum Science

The integrated and independent agency that focuses on marketing, communications, and media solutions, Spectrum Science, has several offices around the United States. This is an agency that works with a proprietary, strategy-first methodology to deliver clients incredible results. Through its integrated marketing, media, and communications services, any client in the science industry is bound to achieve a lot of success.

Hunter PR Profile


A consumer marketing communications firm that was founded in 1989, Hunter utilizes a mix of strategic planning, social and digital media, earned media relations, talent and influencer engagement, multicultural outreach, experiential marketing, and content creation to achieve success for its clients. This is a firm that focuses on earning the attention of consumers, the relationships of clients, and the dedication of staff members to be able to achieve that success.

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Evoke KYNE

The communications agency Evoke KYNE is able to harness experience, insight, and creativity to help its clients achieve success. The agency is a blend of two strong firms, KYNE and Evoke PR & Influences, that joined their forces in 2019 and became one of the biggest health communications agencies in the world. Clients can benefit from services such as brand and data communications, corporate reputation and social impact, global public health, patient advocacy relations, and many others.

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Founded in 1973, Crosby is a marketing and communications firm that helps clients positively impact people’s lives, inspire meaningful actions and contribute to the greater good. The firm can help brands and corporations make powerful connections with consumers, shareholders, and communities through services such as brand development and identity, formative research and strategic planning, content marketing and digital engagement, PR and reputation management, and plenty of others.

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Coyne PR

The full-service integrated communications agency Coyne PR was founded in 1991 and has joined strategy, creativity, and service to help brands and corporations achieve success. Between advertising, public relations, digital marketing, and social media services, clients can benefit from multi-platform solutions that can influence the relationships with their audiences and stakeholders, and drive engagement and growth.

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G&S Business Communications

The public relations and communications firm G&S Business Communications was founded in 1971, and ever since then, it’s been helping innovative businesses change the world around them. G&S Business Communications creates strategies that help clients meet their business goals with meaningful results that move markets. This is done through services such as creative storytelling, digital and social engagement, reputation management, crisis communications, media relations, and many others.

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Fahlgren Mortine 

An integrated communications company, Falghren Mortine was founded in 1962 and helps brands engage in ways that are both meaningful and precise. Fahlgren Mortine is able to help clients get to exactly what really matters through services such as media relations, marketing, and advertising, crisis and reputation management, corporate communications, and others.

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Highwire PR

The public relations agency Highwire PR has offices in San Francisco, Chicago, New York, and Boston, and was founded in 2008. This is an agency that delivers results-oriented and creative communications programs for clients through a number of different services, including digital consultancy, messaging and positioning, media, influencer, and analyst relations, and plenty more.

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Citizen Relations

Founded in 1986, Citizen Relations is a brand communications agency with offices all over the world that works to help clients find the citizen inside every person or brand. The agency is able to manage reputations through services such as data analytics, experiential, performance, and influencer marketing, and many more.


PAN Communications

An integrated marketing and PR agency, PAN Communications was founded in 1995 with the goal of helping healthcare and B2B tech brands transform ideas into attention-grabbing stories that drive awareness. The agency’s services include integrated marketing, public relations, and content marketing, and can benefit clients by positioning them to emerge in new markets or scale globally with integrated strategies.

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