i know that they allow it in North Carolina. But Illinois does not, so I dont know.
From Wikipedia:shrug: :
"United States
State of California: Sections 25980-25984 of the California Health and Safety Code, enacted in 2004 and to become effective July 1, 2012, prohibit the "force feed[ing of] a bird for the purpose of enlarging the bird's liver beyond normal size" as well as the sale of products that are a result of this process.[57]
City of San Diego: On January 8, 2008, the San Diego City Council unanimously[58] passed a resolution that "commends the Animal Protection and Rescue League (APRL) for raising awareness of the cruel practice of force-feeding ducks and geese to produce foie gras, commends the many San Diego restaurants that have stopped selling foie gras before the California statewide ban goes into effect, and encourages San Diegans to avoid supporting this extreme form of animal cruelty." The resolution also cites an independent Zogby poll finding that 85% of San Diegans favor an immediate ban on foie gras.[59][60][61]
City of Chicago: On 26 April 2006, the Chicago City Council voted to ban the sale of foie gras, effective 22 August 2006[62] Breaches of the ban were to be punished with fines of $250–$500.[63] Alderman Joe Moore, who proposed the ban, described the method by which foie gras is produced as "clearly animal cruelty."[63]
In response, several Chicago chefs filed suit and deliberately violated the law by continuing to sell foie gras.[64] Furthermore, a handful of chefs served foie gras without charge, which they considered not to be against the law.[65][66] Even for establishments that were violating the law, the City issued warning letters but, until February 17, 2007, no citations were given. On that date, Doug Sohn, owner of a gourmet hot dog shop was charged with a violation. Although the fine could have been as high as $500, Sohn agreed to pay a $250 fine on March 29.[67][68] Several unusual dishes, including foie gras pizza, have been created in Chicago, in defiance of the City Council's banning of foie gras. 46,000 pounds of foie gras were sold in Chicago in 2006.[63]
In December 2006, Chicago Mayor Richard M. Daley referred to the ban as "the silliest law" the City Council has ever passed.[68] As a result of the ban, Chicago restaurants Spiaggia and Tru developed dishes designed to simulate the foie gras experience. Chicago Tribune restaurant critic Phil Vettel found Tru's "Faux Gras" "close to the real thing", and Spiaggia's "terrina de fagato grasso vegetariano" "undeniably rich and indulgent", but "[lacking] the characteristic foie-gras intensity".[69]
In response to Mayor Daley's objections on the foie gras ban, the City Council overwhelmingly repealed Chicago's ban on May 14, 2008.[70]"
So it was only in Chicago for a while, and soon to be California.