www.usbluepages.gov
Marine Corps
6525 Belcrest Rd, Hyattsville 301 394-0536
940 Fourth St, Laurel 301 498-6059
3050 Crain Hwy, Waldorf 301 843-0353
6192 Oxon Hill Rd, Oxon Hill 301 394-0545
317 E Diamond, Gaithersburg 301 977-4618
2 W Montgomery Ave, Rockville 301 295-2716
Silver Spring 301 587-3008
8700 Central Ave, Landover 301 350-8130
14571 Potomac Mills Rd 703 494-1616
7609-B Richmond Hwy, Alex 703 325-7717
510 N Washington, Falls Church 703 681-9156
The site doesn't say if those #'s are enlisted or Officer (I'd guess enlisted recruiting), but any one of those #'s should be able to point you in the right direction at the least.