Iowa: chart of population by race (1990-2010)

According to the 2010 Census, 91.3% of the population was White (88.7% non-Hispanic white), 2.9% was Black or African American, 0.4% American Indian and Alaska Native, 1.7% Asian, 0.1% Native Hawaiian and other Pacific Islander, 1.8% from two or more races. 5.0% of the total population was of Hispanic or Latino origin (they may be of any race).

Reference 1: White, Black, Asian, Native, Native Hawaiian and other Pacific Islander, Other race and Two or more races.

Reference 2: 1990[72], 2000[73] and 2010[74].

Source: http://en.wikipedia.org/wiki/Government_of_Iowa