Block (XYZ) 10-K 2015 FY Annual report

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors

Square, Inc.:

We consent to the incorporation by reference in the registration statement on Form S-8 (No. 333-208098) of Square, Inc. and subsidiaries of our report dated March 10, 2016, with respect to the consolidated balance sheets of Square, Inc. as of December 31, 2015 and 2014, and the related consolidated statements of operations, comprehensive loss, stockholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2015, which report appears in the December 31, 2015 Annual Report on Form 10-K of Square, Inc.

/s/ KPMG LLP

San Francisco, California

March 10, 2016