Lanark, IL Profile: Facts, Map & Data


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Lanark, Illinois - Basic Facts

The City of Lanark had a population of 1,380 as of July 1, 2018.

The primary coordinate point for Lanark is located at latitude 42.1019 and longitude -89.8328 in Carroll County. The formal boundaries for the City of Lanark (see map below) encompass a land area of 1.13 sq. miles and a water area of 0 sq. miles. Carroll County is in the Central time zone (GMT -6). The elevation is 879 feet.

The City of Lanark (GNIS ID: 2395622) 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 Lanark is located within Township of Rock Creek-Lima, a minor civil division (MCD) of Carroll County.

Beneath the boundary map are tables with Lanark population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2018.

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City of Lanark, IL Boundary Map

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Boundary Maps: Township of Rock Creek-Lima | Carroll County | Illinois Counties

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


Total Population 1,380
Population in Households 1,365
Population in Familes 1,099
Population in Group Qrtrs 15
Population Density2 1,227
Diversity Index3 9


Median Household Income $48,922
Average Household Income $56,582
Per Capita Income $24,459


Total Housing Units 661 (100%)
Owner Occupied HU 463 (70.0%)
Renter Occupied HU 131 (19.8%)
Vacant Housing Units 67 (10.1%)
Median Home Value $92,275
Average Home Value $117,942


Total Households 594
Average Household Size 2.3
Family Households 384
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 -0.66% -0.78%
Households -0.6% -0.75%
Families -0.79% -0.96%
Median Household Income   0.88%
Per Capita Income   1.7%

Lanark, IL - Peer Comparisons by Rank and Percentile

The table below compares Lanark 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 # 606 56th
Population Density # 610 55th
Diversity Index # 946 31st
Median Household Income # 926 32nd
Per Capita Income # 992 28th

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

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