 Montgomery County is home to large and growing African American, Korean American, Puerto-Rican American, Mexican American, and Indian American populations.The county has the second-largest foreign-born population in the region, after Philadelphia County.Of the 286,098 households, 32.00% had children under the age of 18 living with them, 57.20% were married couples living together, 8.80% had a female householder with no husband present, and 30.90% were not families.