EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement (No. 333-144766) on Form S-8 of Umpqua Holdings Corporation of our report dated June 29, 2015, with respect to the statements of net assets available for benefits of Umpqua Bank 401(k) and Profit Sharing Plan as of December 31, 2014 and 2013, the related statement of changes in net assets available for benefits for the year ended December 31, 2014, and the related supplemental Schedule H, line 4i- Schedule of Assets (held at end of year) as of December 31, 2014 appearing in the December 31, 2014 annual report on Form 11-K of the Umpqua Bank 401(k) and Profit Sharing Plan.

/s/ Moss Adams LLP

Seattle, Washington

June 29, 2015