Kelly Services, Inc. revenue for the last year amounted to 4.84 B USD, the most of which — 1.48 B USD — came from its highest performing source at the moment, Professional & Industrial, the year earlier bringing 1.67 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought Kelly Services, Inc. 3.56 B USD, and the year before that — 3.67 B USD.