Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statements on Form S-3 (Nos. 333-41329, 333-61625, 333-71329, 333-67964 and 333-135542) and Form S-8 (Nos. 333-36085, 333-55907, 333-48332, 33-97339, 333-117797, 333-133551, 333-137632 and 333-139201) and related Prospectuses of IndyMac Bancorp, Inc. of our reports dated February 26, 2007 with respect to the consolidated financial statements of IndyMac Bancorp, Inc., IndyMac Bancorp, Inc. management’s assessment of the effectiveness of internal control over financial reporting, and the effectiveness of internal control over financial reporting of IndyMac Bancorp, Inc., in this Annual Report (Form 10-K) for the year ended December 31, 2006.

ERNST & YOUNG LLP
 

Los Angeles, California
February 28, 2007