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The gap between the rich and poor is widening in the Quad-Cities, according to new data from the U.S. Census Bureau.

Incomes are up, particularly in the middle class and in the highest income brackets, but so are the number of people living in poverty.

According to the data, median household income in the Quad-Cities area was $55,635 in 2018, a 3% uptick from the year before and a 20% gain from 2010. The figures are not adjusted for inflation.

Still, the Q-C median income is lower than respective state averages, where Illinois families make $65,030 and Iowans make $59,955.

Local incomes are growing even as poverty is on the rise. In 2018, about 1 in 8 Quad-Citians, or 13%, were below the poverty line, according to the data. In 2017, 11.6% were. It's worse for children, where 1 in 5 is poor — up from 1 in 6 in 2017.

The Quad-Cities' poverty rate was also higher than the average rate in Iowa (11.2%) and Illinois (12.1%). For a family of four, the poverty threshold is an annual income below $25,750.