Illinois · Census place 1764759

Rochester, Illinois

Rochester is a village in Sangamon County, Illinois with an estimated 4,044 residents on July 1, 2024. It is the 368th largest of 651 incorporated places of 1,000+ people in the state.

Population 2024: 4,044; #368 of 651 in Illinois
Change since 2020: +4.7%; +180 people
Land area: 2.7 sq mi
Density: 1,509 / sq mi; State median 2,177

Orange pin: Rochester. Shaded: its county. Dark pin: Springfield.

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Tools and pages that start from Rochester

Rochester population, 2020 to 2024

Rochester added 180 residents from July 2020 to July 2024, a change of +4.7%. In the latest year it moved by +125.

July 1 estimates. The April 2020 estimates base was 3,865. The axis starts above zero so yearly changes are visible.

Rochester covers 2.68 square miles of land, for 1,509 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Rochester is less dense than the typical town.

What county Rochester is in

All of Rochester's residents live in Sangamon County, which had 194,345 residents in 2024. Rochester holds 2.1% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Rochester

1 ZIP Code Tabulation Area (ZCTA) overlaps Rochester by at least 10% of the ZCTA's or the village's land: 62563. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a village that annexed land after 2020 may reach into ZIP codes not listed here.

Where Rochester is

The Census internal point of Rochester is at 39.742800, -89.521700. Springfield, the capital, is 7.3 miles WNW in a straight line. The nearest larger place is Springfield, IL (112,949 people), 7.3 miles away.

Internal point

Decimal: 39.742800, -89.521700
DMS: 39°44'34.08"N 89°31'18.12"W
UTM: 16N 283930.2E 4402252.2N
Geohash: dp064fuq9
Plus code: 86FGPFVH+48

Daylight in Rochester

At 39.74° N, Rochester gets about 14 h 59 min of daylight around the June solstice and 9 h 21 min around the December solstice, a swing of 5 h 38 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Rochester

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is Southern View, 7.0 miles away, with 1,551 people.

Questions people ask

What is the population of Rochester, IL?

4,044 on July 1, 2024, in the Census Vintage 2024 estimates. That is up 180 (4.7%) from 3,864 in July 2020.

What county is Rochester in?

Sangamon County. All of its residents live in that county.

What ZIP codes cover Rochester?

1 ZIP Code Tabulation Area overlaps it by at least 10% of either area: 62563.

How far is Rochester from Springfield?

7.3 miles (11.8 km) in a straight line, heading WNW from Rochester.

What is the nearest larger city to Rochester?

Springfield, IL, with 112,949 residents, 7.3 miles away between internal points.

Sources and data as of

Data as of: Census Vintage 2024 subcounty estimates (July 1, 2024), 2024 Gazetteer places, 2020 ZCTA to place relationship file.

How every number is computed: methodology. Spotted a wrong figure? Report an error.