Update: I erroneously left off Corps in the initial post; I've added it to the list.
I've been taking a look at Sarah Lawsky's entry level hiring list over at Prawfs. I'm sure it's incomplete, but it's the snapshot we've got. She lists 67 entry level hires - 60 of which are on tenure-track.
What fields did schools hire most frequently? I tallied what candidates' first and second areas of interest and for this purpose, considered only the tenure track hires. Thus, with 60 candidates identifying 2 areas each, there are 120 total areas of hire. I conflated relatively similar areas as noted.
With that, these were the top areas of entry level hiring, with the total number of hires who listed each area as their first or second area of interest.
Civil Procedure/Complex Litigation - 10
Crim Law/Civ Pro/White Collar Crime - 8
Intl/Intl Arb/IBT - 7
Con Law/Fed Cts/1st Amdt/Law & Relig - 6
Environmental - 6
Clinic - 5 (five more were not on tenure track)
Contracts - 5
Corps/Securities - 5
IP - 5
Property - 4
Health Law/Hlth Finance/Hlth Fraud - 3
Immigration - 3
Law and Econ - 3
Tax - 3