Lake Petersburg, IL Profile: Facts & Data


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Lake Petersburg, Illinois - Basic Facts

The Lake Petersburg Census Designated Place had a population of 671 as of July 1, 2018. Lake Petersburg ranks in the lower quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Illinois. See peer rankings below.

The primary coordinate point for Lake Petersburg is located at latitude 39.9788 and longitude -89.8525 in Menard County. The formal boundaries for the Lake Petersburg Census Designated Place (see map below) encompass a land area of 1.76 sq. miles and a water area of 0.28 sq. miles. Menard County is in the Central time zone (GMT -6). The elevation is 597 feet.

The Lake Petersburg Census Designated Place (GNIS ID: 2629866) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The Lake Petersburg Census Designated Place is located within Petersburg South Number 15 Election Precinct, a minor civil division (MCD) of Menard County.

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  1. Lake Petersburg 2018 Demographic Data
  2. Growth Rates for Lake Petersburg (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Illinois Research Tools (Easy Tools & Current Data)
  3. Illinois Data Comparison Tool - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


Lake Petersburg, IL Data & Demographics (As of July 1, 2018)


Total Population 671
Population in Households 671
Population in Familes 603
Population in Group Qrtrs 0
Population Density2 381
Diversity Index3 8


Median Household Income $84,319
Average Household Income $107,047
Per Capita Income $48,780


Total Housing Units 387 (100%)
Owner Occupied HU 293 (75.7%)
Renter Occupied HU 20 ( 5.2%)
Vacant Housing Units 74 (19.1%)
Median Home Value $217,204
Average Home Value $218,664


Total Households 313
Average Household Size 2.14
Family Households 248
Average Family Size 2
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  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.


2010-2018 2018-2023
Population -0.83% -0.66%
Households -0.6% -0.45%
Families -0.43% -0.49%
Median Household Income   2.81%
Per Capita Income   3.28%

Lake Petersburg, IL - Peer Comparisons by Rank and Percentile

The table below compares Lake Petersburg to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2018 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 # 830 39th
Population Density # 1150 16th
Diversity Index # 997 28th
Median Household Income # 148 89th
Per Capita Income # 65 95th

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

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