It is the most urban Republican House seat in the nation.
Smaller than Peter King's district, or Michael Grimm's, or something in the OC?
(EDIT: Grimm's district is definitely way smaller than King's, especially post-redistricting. Not sure if anything in the OC comes close to Grimm though.)
The census bureau has a list of CD's by area
(link) that's user-unfriendly if your aim is to read it rather than code with it. The first two digits represent the American National Standards Institute code for the state, which basically means its ordinal position in an alphabetical list of the states together with a few territories like American Samoa, Guam, Puerto Rico, etc.
Unless I'm missing something, Grimm's district (36-11) is the smallest GOP district at 65.8 square miles, followed by Rohrabacher's (06-48) at 145.5, with Culbertson's (48-07), the subject of this thread, third at 161.9, and King's (36-02) fourth at 182.0.
How this interacts with "most urban" I'll let others decide.
