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NW Illinois News

Friday, June 20, 2025

Census Bureau reports Grand Detour population was 345 in 2019

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Grand Detour had a population of 345 people in 2019, according to U.S. Census Bureau data obtained by the NW Illinois News.

The median age was 46, with 55.7 percent of the total population being female and 44.3 percent male.

The state's total population in 2019 was 12,770,631.

An agency of the U.S. Federal Statistical System, the Census Bureau is responsible for compiling statistical facts about the American people, places and economy. Data for this story was compiled from the bureau’s American Community Survey. Information from the survey helps to determine how federal and state funds are distributed.

Grand Detour population by sex

Estimated NumberPercent of total population
Male15344.3
Female19255.7
Total Population345100

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