Rock City, IL 61070 ZIP Code Profile

Related Place Profiles:
Rock City, IL | Rock Grove, IL

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ZIP Code 61070: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Rock City, IL 61070

Not Acceptable, USPS
Rock Grove, IL 61070

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 17
  • Single Family Addresses: 374
  • Multi-Family Addresses: 0
  • County: Stephenson County
  • Centroid: Latitude 42.41, Longitude -89.473
  • Time Zone: Central Time Zone (UTC -6 hours)
  • Observes DST: Yes

Neighborhood Data

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61070 ZIP Code Map

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Rock City, IL 61070 Data & Demographics (As of July 1, 2017)


Total Population 965
Daytime Population: Workers 133
Daytime Population: Residents 444
Total Daytime Population (TDP) 577
Ratio TDP/Total Population1 0.60
Population in Households 965
Population in Familes 856
Population in Group Qrtrs 0
Population Density2 31
Diversity Index3 13


Median Household Income $56,117
Average Household Income $72,117
Per Capita Income $27,875


Total Housing Units 422 (100%)
Owner Occupied HU 319 (75.6%)
Renter Occupied HU 54 (12.8%)
Vacant Housing Units 49 (11.6%)
Median Home Value $143,287
Average Home Value $175,157


Total Households 373
Average Household Size 2.59
Family Households 292
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 -0.42% -0.76%
Households -0.29% -0.65%
Families -0.37% -0.77%
Median Household Income   1.06%
Per Capita Income   2.86%

Rock City, IL 61070 - Peer Comparisons by Rank and Percentile

The table below compares 61070 to the other 1,377 ZIP Codes 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 # 933 32nd
Population Density # 880 36th
Diversity Index # 693 50th
Median Household Income # 601 56th
Per Capita Income # 667 52nd

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

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