Islam A. Siddiqui (Hindi: इस्लाम सिद्दिक़ी) is an Indian-American scientist, and government official, and lobbyist who served as the Chief Agricultural Negotiator in the Office of the United States Trade Representative.

Prior to this, he was Vice President for Science and Regulatory Affairs at CropLife America, and a career official in the California Department of Food and Agriculture.

From 2001 and 2003, Siddiqui was appointed as Senior Associate at the Center for Strategic and International Studies, where he focused on agricultural biotechnology and food security issues.

From 2001 to 2008, Siddiqui was a registered lobbyist with CropLife America, representing biotechnology companies including BASF, Bayer CropScience, Dow AgroSciences, DuPont, FMC Corp., Monsanto, Sumitomo, and Syngenta.

In 2005, speaking on behalf of CropLife America, Siddiqui stated his satisfaction with the defeat of local propositions in California that would have banned cultivation of genetically modified crops.