The pitch process began with 13 agencies on the long list, before being whittled down to a shortlist of four.
In the final round, DDB, part of the Omnicom Group, fought against Leo Burnett, Euro RSCG Tatham Partners and J Walter Thompson Chicago for the work. According to the Illinois Lottery, the agency is now likely to sign a two-year contract, with two optional one-year renewals.
Cathy Beres, director of marketing at the lottery, said: "The new agency's assignment will be to develop an integrated marketing communications plan that further extends the current 'Players have more fun' branding campaign, which has strong equity in the marketplace."
The Illinois Lottery has annual sales of $1.6bn and the profits it generates are used to fund public schools.
If you have an opinion on this or any other issue raised on Brand Republic, join the debate in the .