Rochester, Illinois Population 2021

5,211
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Rochester is a city located in Sangamon County Illinois. Rochester has a 2020 population of 5,211. Rochester is currently declining at a rate of -0.52% annually and its population has decreased by -1.99% since the most recent census, which recorded a population of 5,317 in 2010. Rochester reached it's highest population of 5,388 in 2012.

The average household income in Rochester is $123,873 with a poverty rate of 2.19%. The median rental costs in recent years comes to $1,069 per month, and the median house value is $199,700. The median age in Rochester is 42.5 years, 40.6 years for males, and 43.6 years for females.

Rochester Demographics

According to the most recent ACS, the racial composition of Rochester was:

  • White: 95.97%
  • Black or African American: 1.69%
  • Two or more races: 1.09%
  • Other race: 0.51%
  • Native Hawaiian or Pacific Islander: 0.49%
  • Native American: 0.13%
  • Asian: 0.11%
The current population of Rochester, Illinois is 5,211 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 5,292.The last official US Census in 2010 recorded the population at 5,317.

Rochester, Illinois Population 2021

Population by Race

Race Population Percentage
White5,10195.97%
Black or African American901.69%
Two or More Races581.09%
Some Other Race270.51%
Native Hawaiian and Other Pacific Islander260.49%
American Indian and Alaska Native70.13%
Asian60.11%
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Rochester Population by Race

Rochester Population Pyramid $2021

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Rochester Median Age

42.5


Total

40.6


Male

43.6


Female

Rochester Adults

There are 3,699 adults, (922 of whom are seniors) in Rochester.

Rochester Age Dependency

91.4

Age Dependency Ratio

33.2

Old Age Dependency Ratio

58.2

Child Dependency Ratio

Rochester Sex Ratio

Female

2,716

51.10%

Male

2,599

48.90%

Rochester Population by Age

Rochester Renter vs Owner Occupied by Household Type

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Rochester Household Types

Type Owner Renter
Male100%0%
Married96.6%3.4%
All88.4%11.6%
Female79.7%20.3%
Non Family66.7%33.3%

88.4%

Rate of Home Ownership

Rochester Households and Families

Type Count Average Size Owned
All1,9552.7288.4
Married1,2363.1696.6
Non Family4481.1966.7
Female1773.3379.7
Male943.1100

3.12

Average Family Size

2.72

Average Household Size

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Rochester Households by Type

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Education Attained Count Percentage
Less Than 9th Grade150.43%
9th to 12th Grade591.68%
High School Graduate66819.07%
Some College59717.05%
Associates Degree2717.74%
Bachelors Degree1,13632.44%
Graduate Degree75621.59%
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Rochester Educational Attainment by Sex (over 25)

Rochester Educational Attainment by Race

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Race Total High School Bachelors
White3,3793,3051,852
Black6565
Islander262626
Hispanic252514
Other Race1111
Native American77

The highest rate of high school graduation is among black people with a rate of 100.00%.

The highest rate of bachelors degrees is among islander people with a rate of 100.00%.

Rochester Educational Attainment by Race

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Name Average Male Female
Overall$54,617$64,013$51,522
Less Than 9th Grade$46,172$46,172$
High School Graduate$50,375$51,385$33,875
Some College$50,732$51,742$39,922
Bachelors Degree$69,688$89,531$61,726
Graduate Degree$65,444$81,167$51,458

$54,617

Average Earnings

$64,013

Average Male

$51,522

Average Female

Rochester Earnings by Educational Attainment

Rochester Language by Age

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Rochester Language

97.88% of Rochester residents speak only English, while 2.12% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.50% of the population.

Rochester Language

Rochester Poverty by Race

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2.19%

Overall Poverty Rate

3.23%

Male Poverty Rate

1.18%

Female Poverty Rate

Poverty in Rochester

The race most likely to be in poverty in Rochester is White, with 2.31% below the poverty level.

The race least likely to be in poverty in Rochester is White, with 2.31% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.73%. Among those working part-time, it was 4.46%, and for those that did not work, the poverty rate was 4.76%.

Rochester Poverty

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Name Poverty
Less Than 9th Grade10.81%
High School3.44%
Some College3.11%
Bachelors or Greater1.22%

Rochester Poverty Rate by Education

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Rate Poverty
Female Unemployed0.00%
Male Unemployed17.39%
Female Employed1.93%
Male Employed1.55%

Rochester Poverty Rate by Employment Status and Sex

Rochester Income by Household Type

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Name Median Mean
Households$100,639$123,873
Families$108,203$137,768
Married Families$116,806-
Non Families$44,231$56,150
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Income by Household Type

Rochester Marital Status

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Marriage Rates

61.4%

Overall Marriage Rate

62.2%

Male Marriage Rate

60.5%

Female Marriage Rate

Rochester Married by Age and Sex

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Rochester Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 55-64.

Rochester Marital Status by Race

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Rochester Marital Status

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269

Number of Veterans

249

Male Veterans

20

Female Veterans

War Veterans
Vietnam125
Second Gulf War72
First Gulf War38
World War II8
Korea

Rochester Veterans by War

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Age Group Veterans
65 to 74103
35 to 5445
18 to 3444
55 to 6439
75+38

Rochester Veterans by Age

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Rochester Veterans by Race

Rochester Veterans by Education

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0.00%

Veteran Poverty Rate

27.51%

Veteran Disability Rate

Rochester Veterans by Education

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60.1%

Labor Force Participation

58.9%

Employment Rate

1.9%

Unemployment Rate

Rochester Employment by Age

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Rochester Employment by Race

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Rochester Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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80.21%

Born in Rochester

99.68%

Native Born

0.32%

Foreign Born

0.21%

Non Citizen

0.11%

Naturalized

Place of Birth

99.68% of Rochester residents were born in the United States, with 80.21% having been born in Illinois. 0.21% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Rochester Place of Birth

Year Population Growth Annual Growth Rate
20215,211-27-0.52%
20205,238-27-0.51%
20195,265-27-0.51%
20185,292-34-0.64%
20175,326-27-0.50%
20165,353-25-0.46%
20155,378-2-0.04%
20145,380-2-0.04%
20135,382-6-0.11%
20125,388200.37%
20115,368510.96%
20105,3170.00%

Rochester Population by Year