List of doctoral degrees in the US

The International Affairs Office of the U.S. Department of Education listed 24 frequently awarded research doctorates titles accepted by the National Science Foundation (NSF) as representing degrees equivalent in research content to the Ph.D in 2008. As of the 2014 Survey of Earned Doctorates this had been reduced to 18 after some were judged to be professional rather than research; most Ed.D. degrees were also considered to be professional and removed from the survey but some are still considered research degrees and it remains the second most popular research doctorate after the Ph.D. (albeit with 1.1% of awards compared to 98.1% for the Ph.D.).

The Doctorate (graduate) degrees requiring defense of a Dissertation, based off historic convention, listed in 2008 (noted if 2014 list removed them) are:

In addition the US has several professional degrees (previously, first-professional degrees) in which no Dissertation work is performed (note that in the U.S. all of the following are modeled off post-baccalaureate or terminal Master's/intermediate graduate certification. In most cases, the decision to award the Doctor's degree was a result of graduates' prior use of the title, Dr., and was therefore a courtesy):

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