R. T. Crowley (born March 2, 1948) is a pioneer in the development and practice of Electronic Data Interchange (EDI), an early component of electronic commerce.

He is a developer of the early forms of EDI, working with Edward A. Guilbert, the creator of the technology, from the inception of the idea, and assisted in the development of UN/EDIFACT, the international EDI standard based through the United Nations. He is active in many EDI projects around the world, including having served as chair of ANSI ASC X12, the US national standards body for EDI, from 1993 to 1995.

He is the founder of the EDI standards committee for the ocean transport industry, as well as the US Customs Electronic Systems Advisory Committee (CESAC), advising the US Customs Service (USCS) on matters of electronic commerce. He now serves as chair of the X12 Security Task Group, vice chair of ISO Technical Committee 154 US Technical Advisory Group, and was one of the authors of the X12 technical report on the use of XML for conducting EDI.