What is the number of active (i.e. exclude retired and semi-retired) state-licensed psychologists practicing in the U.S.
Hello! Thanks for your question about the number of active state-licensed psychologists practicing in the US. The short version is that the full picture is not available. As you found, there is some information through the professional organizations but after searching academic databases, corporate websites, industry reports, government reports, professional organizations, and trusted media sites the breakdown of data by type of psychology does not exist. Below you will find a deep dive of my findings.
My approach to find this information was to search academic databases, corporate websites, industry reports, government reports, professional organizations, and trusted media sites. These were useful in answering your main question generally, giving a clear picture of the amount of state-licensed psychologists in the US. As mentioned previously, there is not data for many of the categories of psychology that you mentioned.
Many sources indicated that there are approximately 106,500 psychologists that possess active licenses in the US. There is no published data on how many psychologists are licensed per state, but we do have some general data on the concentration of psychologists across the country. There are more psychologists in the Northeast and along the Pacific coast while lower concentrations of licensed psychologists were found in the South. The source from American Psychological Association gives a very detailed breakdown by country about the concentration of psychologists by county. I do want to point out that those sources state that they only include psychologists licensed with a doctoral degree, but this is a requirement for licensing in each state and so the numbers are accurate.
There is little data about specific areas of psychology, but I will include the information that I did find. As of 2009, there were 32,300 school psychologists in the US. More recent data does not seem to be available to the public. It is projected that there will be 30,500 school psychologist jobs by 2024, which is due to budget cuts in this area despite growing need. The only other reliable source of data available about the other specialties in the question was for IO psychology. There were 1600 IO psychologists in 2014, which is expected to increase to 2500 by 2022. The rest of the publicly available data was what you seemed to find already, which is from the professional organizations and the Bureau of Labor.
To wrap it up, there are approximately 106,000 psychologists licensed in the US. There is unfortunately little public data that gives more than that main figure. Thanks for using Wonder! Please let us know if we can help with anything else.