EXHIBIT 23

Consent of Independent Registered Public Accounting Firm

The Board of Directors

Walker & Dunlop, Inc.:

We consent to the incorporation by reference in the registration statements (Nos. 333-178878 and 333-184297) on Form S-3 and (Nos. 333-171205, 333-183635, and 333-188533) on Form S-8 of Walker & Dunlop, Inc. of our report dated March 7, 2014, with respect to the consolidated balance sheets of Walker & Dunlop Inc. and subsidiaries as of December 31, 2013 and 2012, and the related consolidated statements of income, stockholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2013, and the effectiveness of internal control over financial reporting as of December 31, 2013, which reports appear in the December 31, 2013 Annual Report on Form 10-K of Walker & Dunlop, Inc.

/s/ KPMG LLP

McLean, Virginia

March 7, 2014