Lake Petersburg, IL Profile: Facts & Data

The Lake Petersburg CDP⁽¹⁾ had a population of 728 as of July 1, 2024. 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 39.9836 and longitude -89.8621 in Menard County. The formal boundaries for the Lake Petersburg Census Designated Place 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 Lake Petersburg Census Designated Place 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.

A Census Designated Place (CDP) is a statistical counterpart to a self-governing (incorporated) place such as a city, town, or village. A CDP is not a legal entity and has no governmental functions.

Lake Petersburg, IL Data & Demographics (As of July 1, 2024)

POPULATION
Total Population	728 (100%)
Population in Households	728 (100.0%)
Population in Families	600 (82.4%)
Population in Group Quarters¹	0
Population Density	403
Diversity Index²	17


INCOME
Median Household Income	$87,289
Average Household Income	$100,445
% of Income for Mortgage⁴	17%
Per Capita Income	$46,359
Wealth Index⁵	96
Socioeconomic Status Index⁶	Moderate (57.0)

HOUSING
Total HU (Housing Units)	415 (100%)
Owner Occupied HU	257 (61.9%)
Renter Occupied HU	79 (19.0%)
Vacant Housing Units	79 (19.0%)
Median Home Value	$230,882
Average Home Value	$253,696
Housing Affordability Index³	133

HOUSEHOLDS
Total Households	336
Average Household Size	2.17
Family Households	225
Average Family Size	3.00

NOTES

Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
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 races 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.
The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

Lake Petersburg, IL - Peer Comparisons by Rank and Percentile

The table below compares Lake Petersburg to the other 1,462 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2024 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.

GROWTH RATE / YEAR	2020-2024	2024-2029
Population	-0.38%	-0.33%
Households	0.00%	-0.12%
Families		-0.36%
Median Household Income		2.61%
Per Capita Income		2.64%
Owner Occupied HU		0.77%

Variable Description	Rank	Percentile
Total Population	# 776	47th
Population Density	# 1138	22nd
Median Household Income	# 409	72nd
Housing Affordability Index	# 707	48th
Per Capita Income	# 363	75th
Diversity Index	# 958	35th

Lake Petersburg, IL Profile: Facts & Data

Lake Petersburg, Illinois - Basic Facts

Lake Petersburg, IL Data & Demographics (As of July 1, 2024)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

Lake Petersburg, IL - Peer Comparisons by Rank and Percentile

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Menard County