Flat Rock demographics profile

StatisticFlat RockIllinoisNational
Population density (sq mi)38422291
Median age43.637.437.7
Male/Female ratio0.8:11.0:11.0:1
Married (15yrs & older)60%55%55%
Families w/ Kids under 1833%44%43%
Speak English97%77%79%
Speak Spanish2%13%13%
Flat Rock, IL has a population of 329 and is the 21,980th largest city in the United States. The population density is 384 per sq mi which is 73% higher than the Illinois average and 324% higher than the national average. The median age in Flat Rock is 44 which is approximately 17% higher than the Illinois average of 37. In Flat Rock, 60% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 66% of Flat Rock residents were born in Illinois, 33% were born out of state, 0% were born outside of the United States and 1% were foreign born.
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Did you know?

  • The population density in Flat Rock is 73% higher than Illinois.
  • The median age in Flat Rock is 17% higher than Illinois.
  • In Flat Rock 94.83% of the population is White.
  • In Flat Rock 0.00% of the population is Black or African American.
  • In Flat Rock 0.61% of the population is Asian.

Compare Flat Rock, IL Demographics To Other Cities

Flat Rock population breakdown by race

RaceFlat RockIllinoisNational
Black or African American0.00%14.30%12.63%
American Indian0.91%0.23%0.82%
Native Hawaiian0.00%0.03%0.18%
Mixed race3.65%2.34%3.06%
Other race0.00%5.86%4.75%
In Flat Rock, 0.0% of people are of Hispanic or Latino origin.
Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

Flat Rock age breakdown

Marital status

Age of children in married couples

Source: The Flat Rock, IL demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).
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