Lake Petersburg, IL Profile: Facts, Map & Data


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Lake Petersburg, Illinois - Basic Facts

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The Lake Petersburg Census Designated Place had a population of 664 as of July 1, 2016. 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.

Beneath the boundary map are tables with Lake Petersburg population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2016.

Neighborhood Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting certain data.


Lake Petersburg Census Designated Place, IL Boundary Map

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Boundary Maps: Petersburg South Number 15 Election Precinct | Menard County | Illinois Counties

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Lake Petersburg, IL Data & Demographics (As of July 1, 2016)


Total Population 664
Population in Households 664
Population in Familes 595
Population in Group Qrtrs 0
Population Density1 377
Diversity Index2 9


Total Households 308
Average Household Size 2.16
Family Households 245
Average Family Size 2


Total Housing Units 387 (100%)
Owner Occupied HU 292 (75.5%)
Renter Occupied HU 16 ( 4.1%)
Vacant Housing Units 79 (20.4%)
Median Home Value $210,000
Average Home Value $207,414


Median Household Income $82,834
Average Household Income $109,847
Per Capita Income $49,937
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -1.27% -0.95%
Households -1.05% -0.86%
Families -0.76% -0.91%
Median Household Income   1.77%
Per Capita Income   1.96%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

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, 2016 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 # 838 39th
Population Density1 # 1159 15th
Diversity Index2 # 921 33rd
Median Household Income # 124 91st
Per Capita Income # 48 97th

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

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