The largest staffing agencies in the US shape the workforce by connecting businesses with skilled professionals and helping job seekers find meaningful roles. These agencies bridge gaps in industries like healthcare, IT, engineering, and finance, offering temporary, contract, and permanent placement services. In 2025, the staffing industry thrives, with top firms generating billions in revenue while adapting to flexible work trends. This guide explores the biggest players, their specialties, and how they empower employers and candidates. Whether you’re a business seeking talent or a professional pursuing your next opportunity, these agencies provide solutions to meet your needs. Let’s dive into the leaders driving America’s staffing landscape.
Why the Largest Staffing Agencies in the US Matter
Staffing agencies streamline hiring by matching businesses with qualified candidates, saving time and resources. The largest staffing agencies in the US generated $145.2 billion in 2023, accounting for 76% of the market, according to Staffing Industry Analysts (SIA). They serve industries from healthcare to technology, addressing the growing demand for flexible work arrangements. For job seekers, these agencies offer access to diverse roles, from temporary gigs to permanent positions, often with benefits like healthcare or training. For example, a nurse might secure a travel assignment through a healthcare staffing firm, while an IT professional finds a contract-to-hire role via a tech-focused agency. These firms build lasting partnerships, ensuring businesses stay competitive and candidates achieve career goals.
Benefits for Employers
- Access to pre-screened talent pools
- Reduced hiring costs and time
- Flexible staffing for project needs
Pro Tip: Partner with agencies specializing in your industry for tailored talent solutions.
Benefits for Job Seekers
- Access to diverse job opportunities
- Career counseling and skill training
- Flexible work options
Pro Tip: Register with multiple agencies to explore varied roles.
These agencies drive economic growth by filling critical roles, making them essential for businesses and workers alike.
Top 5 Largest Staffing Agencies in the US for 2025
The largest staffing agencies in the US stand out for their revenue, reach, and industry impact. Below are the top five, based on 2023 revenue data and their 2025 performance trends, as reported by sources like Staffing Industry Analysts and Statista. Each agency excels in specific sectors, offering unique services to meet diverse needs.
1. Adecco
Adecco leads with $24.8 billion in 2022 US revenue, per Statista. Headquartered in Jacksonville, Florida, it operates 450 locations across 60 countries. Adecco specializes in temporary, contract-to-hire, and direct hire roles across industries like IT, finance, and hospitality. Its Xpert system ensures thorough candidate screening, making it a go-to for businesses needing quick, reliable talent. Job seekers benefit from free training and benefits like healthcare. Visit Adecco.
2. Manpower
Manpower, with $19.8 billion in 2022 US revenue, operates over 3,000 offices globally. Founded in 1948, this Milwaukee-based firm excels in contingent and permanent placements in manufacturing, IT, and HR. Its partnerships with organizations like the American Staffing Association ensure robust talent pipelines. Manpower offers career counseling, helping candidates transition to permanent roles. Visit Manpower.
3. Allegis Group
Allegis Group, based in Hanover, Maryland, ranks as the largest private staffing firm, with subsidiaries like Aerotek and TEKsystems. It serves engineering, IT, and clinical sectors, offering contract and direct hire services. Allegis connects specialized talent with Fortune 1000 clients, emphasizing industry expertise. Its global reach supports businesses scaling rapidly. Visit Allegis Group.
4. Aya Healthcare
Aya Healthcare, based in San Diego, dominates healthcare staffing, generating $47.3 billion in 2023 revenue across 100 firms, per SIA. It specializes in travel nursing, locum tenens, and allied health roles, placing professionals in hospitals nationwide. Aya’s 24/7 support ensures quick placements, often within 72 hours. Visit Aya Healthcare.
5. Insight Global
Insight Global, ranked 5th by SIA in 2024, generated $3.7 billion in 2023 revenue. Based in Atlanta, it focuses on IT, finance, and engineering, serving Fortune 1000 clients. Insight Global offers culture consulting and specialized staffing, ensuring precise candidate matches. Its growth reflects a people-first approach. Visit Insight Global.
These agencies lead by combining scale with specialized expertise, making them trusted partners for businesses and job seekers.
Specialized Staffing Agencies to Watch
Beyond the largest staffing agencies in the US, niche firms excel in specific sectors. These agencies focus on industries like IT, healthcare, or engineering, delivering tailored solutions. Their deep industry knowledge ensures precise candidate matches, benefiting both employers and job seekers. Here are three standout specialized agencies for 2025.
Robert Half
Robert Half, with over 70 years of experience, specializes in finance, accounting, and IT staffing. It offers contract, temporary, and permanent placements, serving businesses of all sizes. Its rigorous screening process ensures high-quality candidates. Visit Robert Half.
Kforce
Kforce focuses on technology and finance, offering strategic partnerships for contract and direct hire roles. Its national recruiting centers provide deep industry expertise, connecting clients with top talent. Visit Kforce.
FlexCare Medical Staffing
FlexCare specializes in healthcare, placing nurses and allied health professionals in travel and permanent roles. Its ExpressCare program ensures placements within 72 hours, with benefits like 401(k) matching. Visit FlexCare.
These agencies shine by focusing on niche markets, offering specialized services that complement the broader reach of larger firms.
How to Choose the Right Staffing Agency
Selecting from the largest staffing agencies in the US requires evaluating your needs. Businesses should prioritize agencies with expertise in their industry, while job seekers should seek firms offering roles that match their skills. Consider the agency’s reputation, candidate screening process, and service offerings, such as temporary staffing or direct hire. For example, a tech startup might choose TEKsystems for IT expertise, while a hospital might partner with Aya Healthcare for nursing staff.
For Employers
- Check industry specialization
- Review candidate screening processes
- Ask about placement success rates
Pro Tip: Request case studies from agencies to see their impact.
For Job Seekers
- Look for agencies with roles in your field
- Inquire about benefits and training
- Check reviews on sites like Glassdoor
Pro Tip: Prepare a resume highlighting your skills before registering.
Choosing the right agency ensures a strong match, whether you’re hiring or seeking a job. Research thoroughly to find the best fit.
Trends Shaping the Staffing Industry in 2025
The largest staffing agencies in the US adapt to evolving workforce trends. In 2025, hybrid work models drive demand, with 56% of IT workers preferring flexible arrangements, per Innovature BPO. Agencies leverage technology, like AI-driven candidate matching, to streamline hiring. Healthcare staffing grows due to 1.2 million projected engineering and healthcare job openings by 2026. Diversity-focused staffing also rises, with firms like Aquent earning recognition for inclusive practices. These trends ensure agencies remain vital in a dynamic job market.
Key Trends
- Rise of hybrid and remote work
- AI-driven candidate screening
- Focus on diversity and inclusion
Impact on Agencies
- Expanded talent pools
- Faster placement times
- Specialized industry focus
Staying informed about these trends helps businesses and job seekers partner with agencies that align with modern workforce needs.
Partner with the Best for Your Future
The largest staffing agencies in the US empower businesses to build strong teams and help job seekers find fulfilling careers. From Adecco’s global reach to Aya Healthcare’s rapid placements, these firms offer tailored solutions for diverse industries. By understanding their services and trends like hybrid work, you can choose the right partner. Whether you’re a business scaling operations or a professional seeking your next role, these agencies provide the tools to succeed. Start exploring opportunities with these industry leaders to shape a brighter future.
FAQs About the Largest Staffing Agencies in the US
What services do the largest staffing agencies in the US offer?
They provide temporary staffing, contract-to-hire, direct hire, and workforce management solutions across industries like IT, healthcare, and finance.
How do staffing agencies screen candidates?
Agencies use background checks, reference verifications, and skill assessments, like Adecco’s Xpert system, to ensure candidates meet job requirements.
Can job seekers work with multiple staffing agencies?
Yes, registering with multiple agencies increases access to diverse job opportunities, but communicate clearly to avoid conflicts.
What industries do these agencies serve?
Top agencies cover healthcare, IT, engineering, finance, manufacturing, and more, with specialized firms focusing on niche sectors.
How do staffing agencies benefit businesses?
They reduce hiring time, access large talent pools, and offer flexible staffing solutions, saving costs and improving workforce efficiency.
