PlainZIP

Franklin Grove, IL · standard

ZIP Code 61031

Lee County, Illinois — Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

1,656
14/sq mi
$75,446
Median income
$136,700
Median home value
28.2%
Bachelor's or higher

The verdict

Franklin Grove pairs an above-median household income with among the most affordable home values nationally, in a rural, homeowner-dominated area.

Top 44%
household income, US ZIPs
22th pct
home value, US ZIPs
14
people per sq mi
77%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 61031 against every reporting US ZIP.

ZIP code 61031 is classified by USPS as a standard delivery area and covers roughly 120.0 square miles in Franklin Grove, Lee County, Illinois. The area is home to 1,656 residents, producing a population density of 14 people per square mile, and falls within the Chicago time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 61031 against Illinois and the nation.

On the economic side, the median household income for ZIP 61031 sits at $75,446 (6% below the Illinois average), while per-capita income is $35,828. The poverty rate stands at 8.2% and the unemployment rate at 0.8%. On housing, the median home value is $136,700 (29% below the state average) with median rent at $823 per month, and 77.4% of occupied units are owner-occupied, a direct signal of whether 61031 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 28.2% of adults hold a bachelor's degree or higher, the median age is 49.9, and the average commute is 31 minutes. We also surface 5 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Lee County, so you can benchmark 61031 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →

Top industries in ZIP 61031

Top 5 sectors by establishment count

Which industries have the most business establishments in ZIP 61031.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, FHFA HPI for ZIP 61031, Franklin Grove, IL · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; HUD FMR + FHFA HPI updated quarterly/annually.

Quick Facts

1,656

Population

120.0

Area (sq mi)

14

People / sq mi

Chicago

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 61031?

49.9

Median Age

48.1%

Male

51.9%

Female

1.4%

Foreign-Born

White 88.9%
African American 0.5%
Asian 0.2%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 10.2%
Hispanic or Latino 8.6%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$75,446

Median Household Income

-6% vs state

$35,828

Per Capita Income

8.2%

Poverty Rate

0.8%

Unemployment Rate

30.8 min

Mean Commute Time

How ZIP 61031 ranks nationally

Household income vs. every US ZIP code

Median household income — the full national distribution, with this ZIP marked

$75,446 Top 44% higher than 56% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). This entry sits in this band. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau — ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 70.4%
Bachelor's Degree or Higher 28.2%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

652

Total Housing Units

607

Occupied Units

45

Vacant Units

2.28

Avg Household Size

Occupancy Type

Owner 77.4%
Renter 22.6%

$136,700

Median Home Value

-29% vs state

$823

Median Rent

1960

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+20.1%

YoY Change (2023)

174

HPI Index (2000 = 100)

+74%

Total Change Since 2000

Home values in ZIP 61031 have increased 20.1% over the past year (2023). Since 2000, this ZIP has seen +74% cumulative appreciation.

Year Annual Change HPI Index
2019 +4.4% 125
2020 +2.3% 128
2021 -3.3% 124
2022 +16.5% 145
2023 +20.1% 174

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2023. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 19 business establishments in ZIP 61031, employing approximately 247 people with a combined annual payroll of $7,526,000.

19

Businesses

247

Employees

$7.5M

Annual Payroll

3

Industry Sectors

Industry Establishments % of Total
Construction 5 26.3%
Transportation and warehousing 3 15.8%
Finance and insurance 3 15.8%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 61031 vs 61057 →

ZIP 61031 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 61031 ranks #3 by population — useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 61031 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 61031 ranks #2 of 3 neighboring ZIPs — local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
61057 Nachusa, IL 168 3.6 mi
61331 Lee Center, IL 55 6.1 mi
61006 Ashton, IL 1,759 5.7 mi
61324 Eldena, IL 109 6.7 mi
61310 Amboy, IL 3,970 9.2 mi

More ZIP Codes in Lee County

61021 standard
Dixon, IL
Pop: 23,745
61310 standard
Amboy, IL
Pop: 3,970
61006 standard
Ashton, IL
Pop: 1,759
61353 standard
Paw Paw, IL
Pop: 1,333
61367 standard
Sublette, IL
Pop: 864
60553 standard
Steward, IL
Pop: 782

Related Areas

Lee County Franklin Grove, IL Illinois

Frequently Asked Questions

What county is ZIP code 61031 in? ▼
ZIP code 61031 (Franklin Grove) is located in Lee County, Illinois. Lee County contains multiple ZIP codes, see the full list at /counties/lee-il.
What is the population of ZIP code 61031? ▼
ZIP code 61031 in Franklin Grove, IL has a population of 1,656 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 61031? ▼
The median household income in ZIP 61031 is $75,446, which is 1% below the national average of $76,288.
What is the average home value in ZIP 61031? ▼
The median home value in ZIP 61031 is $136,700, which is 51% below the national average of $278,155.
What is the demographic makeup of ZIP 61031? ▼
The largest racial group in ZIP 61031 is White at 88.9%. Hispanic or Latino residents make up 8.6% of the population.
How many businesses are in ZIP code 61031? ▼
ZIP code 61031 has 19 business establishments employing approximately 247 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 61031? ▼
The top industries by establishment count in ZIP 61031 are: Construction (5), Transportation and warehousing (3), Finance and insurance (3). There are 3 industry sectors represented in total.
How have home values changed in ZIP code 61031? ▼
According to the FHFA House Price Index, home values in ZIP 61031 increased by 20.1% in 2023. Since 2000, home values in this ZIP have appreciated by approximately 74%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 61031? ▼
In ZIP code 61031, 70.4% of residents aged 25+ have a high school diploma or higher, and 28.2% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 61031? ▼
The mean commute time for workers in ZIP code 61031 is 30.8 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 61031? ▼
In ZIP code 61031, approximately 77.4% of occupied housing units are owner-occupied and 22.6% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 61031? ▼
The poverty rate in ZIP code 61031 is 8.2% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

ZIP Code Research Guides

Reading Census Demographics
How to interpret population, income, and education data from the Census Bureau.
Understanding ZIP Code Data
What ZIP codes are, how ZCTAs differ, and what the data reveals.
Best ZIP Codes for Families
Key factors to evaluate when choosing a family-friendly neighborhood.
ZIP Codes for Relocation
Data-driven tips for evaluating ZIP codes before a move.

Official Data Resources for Franklin Grove, IL

Verify and explore additional data for this area using these official government sources.

U.S. Census Bureau
Official demographic, economic, and housing data from the American Community Survey.
HUD Fair Market Rents
Department of Housing and Urban Development rental cost estimates by metropolitan area.
FBI Uniform Crime Reports
Official crime statistics compiled from law enforcement agencies nationwide.
FHFA House Price Index
Federal Housing Finance Agency home value trends based on repeat sales and appraisals.

Read our methodology to see how this data is sourced, computed, and verified.