Births to unwed mothers in Pima County are not evenly distributed among racial and ethnic groups.

Although Hispanics make up about one-third of the county's population, they accounted for more than half of the births to unwed mothers in 2011, Arizona Department of Health Services data show.

By contrast, whites, who constitute just more than half of the population, accounted for less than a third of those births.

The mothers of 9 percent of the children born to unwed mothers in 2011 were American Indian, 2 percent were Asian and 6 percent were black.

Contact reporter Carli Brosseau at or 573-4197. On Twitter: @carlibrosseau