From a Washington Post analysis by Andrew Van Dam headlined “What does your job say about whom you’ll marry”:

In a recent column, we measured which college majors were most likely to marry their own kind. This prompted our friend and fellow Washington Post reporter Jeff Stein to ask on behalf of his lawyer dad what the same data would show for professions. His lawyer mom was curious, too.

As Jeff and his folks may have guessed, lawyers rank in the top five for marrying within their own profession, at least among the 52 occupations for which we have sufficient data. The top spot goes to medical doctors, according to our analysis of responses to the Census Bureau’s American Community Survey over the past decade.