The E Pluribus Unum prizes are a national awards program from the Migration Policy Institute that provides four $50,000 prizes annually to exceptional initiatives that promote immigrant integration. 

In 2009, the City of Littleton and the Littleton Immigrant Resources Center (formerly the Littleton Immigrant Integration Initiative, or LI3) received the E Pluribus Unum grant of $50,000. The award recognizes outstanding immigrant integration initiatives of all types, whether led by nonprofit or community organizations, businesses, public agencies, religious groups, or individuals.