Marietta demographics profile

Population density (sq mi)36622291
Median age55.737.437.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)67%55%55%
Families w/ Kids under 1822%44%43%
Speak English97%77%79%
Speak Spanish3%13%13%
Marietta, IL has a population of 100 and is the 26,928th largest city in the United States. The population density is 366 per sq mi which is 65% higher than the Illinois average and 304% higher than the national average. The median age in Marietta is 56 which is approximately 49% higher than the Illinois average of 37. In Marietta, 67% of the population over 15 years of age are married, 97% speak English and 3% speak Spanish. 89% of Marietta residents were born in Illinois, 11% were born out of state, 0% were born outside of the United States and 0% were foreign born.
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Did you know?

  • The population density in Marietta is 65% higher than Illinois.
  • The median age in Marietta is 49% higher than Illinois.
  • In Marietta 83.00% of the population is White.
  • In Marietta 15.00% of the population is Black or African American.
  • In Marietta 0.00% of the population is Asian.

Compare Marietta, IL Demographics To Other Cities

Marietta population breakdown by race

Black or African American15.00%14.30%12.63%
American Indian0.00%0.23%0.82%
Native Hawaiian0.00%0.03%0.18%
Mixed race1.00%2.34%3.06%
Other race1.00%5.86%4.75%
In Marietta, 2.0% 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

Marietta age breakdown

Marital status

Age of children in married couples

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