sentences:  The per capita income for the county was $17,451.About 20.6% of families and 22.6% of the population were below the poverty line, including 32.3% of those under age 18 and 15.0% of those age 65 or over.Hidalgo has historically been a swing county, going for the winner every time since 1928, except for 1968, when it went for Hubert Humphrey over the winner, Richard Nixon.