Marengo is a city located in McHenry County Illinois. With a 2020 population of 7,552, it is the 276th largest city in Illinois and the 5058th largest city in the United States. Marengo is currently declining at a rate of -0.11% annually and its population has decreased by -4.05% since the most recent census, which recorded a population of 7,871 in 2020. Spanning over 8 miles, Marengo has a population density of 957 people per square mile.
The average household income in Marengo is $80,315 with a poverty rate of 14.65%. The median rental costs in recent years comes to $901 per month, and the median house value is $157,000. The median age in Marengo is 36.7 years, 36.4 years for males, and 36.9 years for females.
According to the most recent ACS, the racial composition of Marengowas:
Rate of Home Ownership
Average Family Size
Average Household Size
The highest rate of high school graduation is among other race people with a rate of 100.00%.
The highest rate of bachelors degrees is among white people with a rate of 19.37%.
88.02% of Marengo residents speak only English, while 11.98% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 9.15% of the population.
Overall Poverty Rate
Male Poverty Rate
Female Poverty Rate
The race most likely to be in poverty in Marengo is Black, with 40.74% below the poverty level.
The race least likely to be in poverty in Marengo is Other, with NaN% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 6.55%. Among those working part-time, it was 16.64%, and for those that did not work, the poverty rate was 22.17%.
Number of Veterans
Veteran Poverty Rate
Veteran Disability Rate
Labor Force Participation
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Born in Marengo
91.95% of Marengo residents were born in the United States, with 77.50% having been born in Illinois. 2.86% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.