Largest staffing firms in the U.S. by revenue 2018

In terms of revenue, Allegis Group is the clear leader in the U.S. staffing market, with 10.23 billion U.S. dollars in 2018, they generated over twice the income of their nearest competitors, Randstad and Adecco.

The staffing industry

The staffing industry can be divided into two main categories – the provision of short-term staff to organizations and assisting organizations to source and recruit new permanent staff members. On average, short term workers are hired for around ten weeks, but this figure hides some important distinctions between contract and temporary staff. Contract workers are hired for a specific length of time (e.g. three or six months) with consistent conditions over this period, whereas temporary staff are generally recruited for only a few days or weeks and are paid by hour depending on the amount of work that is required each day.

Size of the industry

In 2018, the market size of the staffing industry in the U.S. was just under 150 billion U.S. dollars, of which over 80 percent was from the provision of short-term staff. This makes the U.S. the largest single market for temporary staffing in the world. Despite the size of the market, the rate of temporary staff relative to permanent workers in the U.S. is actually much lower than in many other developed economies – being less than half the rate of the United Kingdom.

Largest staffing firms in the United States in 2018, ranked by revenue

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Release date

July 2019


United States

Survey time period


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