Petersburg, IL Profile: Facts, Map & Data


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Petersburg, Illinois - Basic Facts

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The City of Petersburg had a population of 2,199 as of July 1, 2017.

The primary coordinate point for Petersburg is located at latitude 40.0138 and longitude -89.8476 in Menard County. The formal boundaries for the City of Petersburg (see map below) encompass a land area of 1.46 sq. miles and a water area of 0 sq. miles. Menard County is in the Central time zone (GMT -6). The elevation is 512 feet.

The City of Petersburg (GNIS ID: 2396193) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Petersburg is located within Petersburg East Number 13 Election Precinct, a minor civil division (MCD) of Menard County.

Beneath the boundary map are tables with Petersburg population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Alternate Unofficial Names for Petersburg: Petersburgh.

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City of Petersburg, IL Boundary Map

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Boundary Maps: Petersburg East Number 13 Election Precinct | Menard County | Illinois Counties

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Petersburg, IL Data & Demographics (As of July 1, 2017)


Total Population 2,199
Daytime Population: Workers 1,085
Daytime Population: Residents 1,163
Total Daytime Population (TDP) 2,248
Ratio TDP/Total Population1 1.02
Population in Households 2,124
Population in Familes 1,630
Population in Group Qrtrs 75
Population Density2 1,509
Diversity Index3 10


Median Household Income $42,298
Average Household Income $56,501
Per Capita Income $26,044


Total Housing Units 1,092 (100%)
Owner Occupied HU 568 (52.0%)
Renter Occupied HU 403 (36.9%)
Vacant Housing Units 121 (11.1%)
Median Home Value $93,031
Average Home Value $121,171


Total Households 971
Average Household Size 2.19
Family Households 578
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population -0.38% -0.57%
Households -0.18% -0.46%
Families -0.45% -0.56%
Median Household Income   1.46%
Per Capita Income   2.89%

Petersburg, IL - Peer Comparisons by Rank and Percentile

The table below compares Petersburg to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 489 64th
Population Density # 462 66th
Diversity Index # 827 39th
Median Household Income # 1110 19th
Per Capita Income # 737 46th

Additional comparisons and rankings can be made with a VERY EASY TO USE Illinois Census Data Comparison Tool.

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