Using data from the Program for the International Assessment of Adult Competencies, this paper compares the earnings premium and employment share of jobs in Science, Technology, Engineering and Mathematics (STEM) across 11 member countries of the Organisation for Economic Co-operation and Development. The results reveal that the STEM wage premium is higher in the United States than in any of the other comparison countries, despite the fact that the U.S. has a larger share of workers in STEM jobs. We also find evidence that the premium varies significantly across STEM sub-fields and education levels, and that the premium tends to be higher in countries with lower unionization rates, less employment protection, or a larger share of employment in the public sector. [This is the online first version of an article published in "New Horizons in Adult Education and Human Resource Development."]