Ballot Measure 27 of 2002 would have required the mandatory labelling of all genetically modified food sold in the State of Oregon. The measure was defeated in the November 5, 2002 general election with 371,851 votes in favor, 886,806 votes against.[1] The measure was placed on the ballot as a result of initative petition.

Proponents of the measure argued that "Oregonians should have the right to know what they are eating." They repeated the belief of some activists that genetic engineering of food poses a potential threat to health and safety. (See frankenfood.) Proponents also ridiculed the cost estimates of the law brought by the measure's opponents.[1] Proponents hoped that an Oregon labelling law would spark debate about the use of GMOs in food and eventually a nationwide labelling system.

Opponents aruged that Oregon's agricultural industry would be burdened by excessive costs if the measure were to pass, given the lack of such a requirement throughout the rest of the United States. In addition, opponents noted the lack of evidence that GMO foods posed a danger to human health.[1] Monsanto, an agricultrual company whose products comprise 70% of the GMO market, donated $1.5 million to the effort against the measure.[1]

See also: List of Oregon ballot measures

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