Staffing Industry Analysts today released its annual list of largest US staffing firms, which included 122 staffing firms with US staffing revenue of more than $100 million.

The five largest firms in the US by 2014 staffing revenue are:

1. Allegis Group, $8.29 billion
2. Adecco, $4.50 billion
3. Randstad Holding, $4.40 billion
4. ManpowerGroup $3.82 billion
5. Kelly Services, $3.29 billion

The 122 firms on the list generated $69.4 billion in US staffing revenue, which comprised 55.9% percent of the total market.

In this year’s report, revenue estimates reflect “staffing revenue” defined as revenue related to temporary staffing, direct hire, retained search, and temp-to-hire conversion fees.

“The $69 billion in staffing revenue generated by these firms underscores the health of the staffing industry, and provides bottom-up evidence that supports our belief that the overall industry continues to grow at a rate significantly faster than the overall economy,” said Barry Asin, president of Staffing Industry Analysts. “In addition, while there is sometimes a public perception of the staffing industry as only providing lower wage jobs, we note that roughly two thirds of the staffing firms listed in this report have professional occupations or retained search as their largest revenue segment.”

Corporate members of Staffing Industry Analysts can download the full report by clicking here.