Debit Interchange Fee Study Act of 2011

Debit Interchange Fee Study Act of 2011 - Amends the Electronic Fund Transfer Act to extend from 9 months after the date of enactment of the Consumer Financial Protection Act of 2010 to 24 months after the date of enactment of this Act the rulemaking timelines and effective dates for the proposed debit interchange (swipe) rule of the Board of Governors of the Federal Reserve System (Board) that is required by the Dodd-Frank Wall Street Reform and Consumer Protection Act.

Declares void and without legal effect any regulation proposed or prescribed by the Board pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act before the date that is 6 months after completion of the study required by this Act.

Directs specified banking regulatory agencies (study agencies) to study jointly and report to certain congressional committees regarding the impact of regulating debit interchange transaction (swipe) fees and related issues under the Electronic Fund Transfer Act. Prescribes study contents including the costs and benefits of electronic debit card transactions (EDTs) and alternative forms of payment, including cash, check, and automated clearing house (ACH) for consumers, merchants, issuers, and debit card networks.