Rochester is a city located in Sangamon County Illinois. With a 2023 population of 3,814, it is the 379th largest city in Illinois and the 5539th largest city in the United States.Rochester is currently declining at a rate of -0.34% annually and its population has decreased by -1.01% since the most recent census, which recorded a population of 3,853 in 2020. Spanning over 2 miles, Rochester has a population density of 1,619 people per square mile.
The average household income in Rochester is $117,886 with a poverty rate of 1.87%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Rochester is 41 years, 36.8 years for males, and 44.5 years for females.
According to the most recent ACS, the racial composition of Rochester was:
White
Black or African American
Asian
Two or more races
Other race
Native Hawaiian or Pacific Islander
Native American
3.03
Average Family Size
2.67
Average Household Size
91.9%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
The highest rate of high school graduation is among black people with a rate of 100%.
The highest rate of bachelors degrees is among asian people with a rate of 100%.
All
Male
Female
$53,705
Average Earnings
$59,643
Average Male
$50,296
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
98.35% of Rochester residents speak only English, while 1.65% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 2.07% of the population.
rate
1.87%
Overall Poverty Rate
1.85%
Male Poverty Rate
1.14%
Female Poverty Rate
The race most likely to be in poverty in Rochester is White, with 2.03% below the poverty level.
The race least likely to be in poverty in Rochester is White, with 2.03% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 0%. Among those working part-time, it was 4.55%, and for those that did not work, the poverty rate was 2.63%.
rate
rate
Households
Families
MarriedFamilies
NonFamilies
mean
median
Married
Widowed
Divorced
Separated
NeverMarried
56.8%
Overall Marriage Rate
64.8%
Male Marriage Rate
50.5%
Female Marriage Rate
male
female
The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is Over 65.
Married
Widowed
Divorced
Separated
NeverMarried
Second Gulf War
First Gulf War
Vietnam
Korea
World War II
249
Number of Veterans
241
Male Veterans
8
Female Veterans
count
count
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
0%
Veteran Poverty Rate
20.08%
Veteran Disability Rate
LaborForceParticipation
53.1%
Labor Force Participation
51.2%
Employment Rate
3.6%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
Europe
Asia
Africa
Oceania
Latin America
North America
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Europe
Asia
Africa
Oceania
Latin America
North America
80.61%
Born in Rochester
97.53%
Native Born
0.52%
Foreign Born
0.36%
Non Citizen
0.16%
Naturalized
97.53% of Rochester residents were born in the United States, with 80.61% having been born in Illinois. 0.36% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.