40121 vs 40109 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 40121, Orange = ZIP 40109.
Quick verdict: ZIP 40121 is wealthier, more diverse, more educated. ZIP 40109 is lower poverty rate, lower unemployment, higher work-from-home share.
Quick Facts
ZIP 40121
Fort Knox CDP, KY
View full profile →- Population8,715
- Median Income$74,224
- Median Home Value—
- Median Rent$1,218
- Median Age24.3 yrs
- Poverty Rate8.0%
ZIP 40109
Brooks CDP, KY
View full profile →- Population2,363
- Median Income$73,350
- Median Home Value$240k
- Median Rent—
- Median Age48.9 yrs
- Poverty Rate4.0%
Visual comparison (same scale)
Population
8,7152,363
Median Income
$74,224$73,350
Median Home Value
—$240k
Median Rent
$1,218—
Median Age
24.3 yrs48.9 yrs
Poverty Rate
8.0%4.0%
Demographics
ZIP 40121
Fort Knox CDP, KY
View full profile →- White %59.4%
- Black %16.0%
- Asian %2.3%
- Hispanic %25.1%
- Age 0–17 %32.3%
- Age 18–64 %66.0%
- Age 65+ %1.7%
- Bachelor's+ %42.1%
- Diversity Index56/100
ZIP 40109
Brooks CDP, KY
View full profile →- White %96.8%
- Black %0.6%
- Asian %0.0%
- Hispanic %0.0%
- Age 0–17 %14.3%
- Age 18–64 %69.3%
- Age 65+ %16.4%
- Bachelor's+ %17.4%
- Diversity Index6/100
Visual comparison (same scale)
White %
59.4%96.8%
Black %
16.0%0.6%
Asian %
2.3%0.0%
Hispanic %
25.1%0.0%
Age 0–17 %
32.3%14.3%
Age 18–64 %
66.0%69.3%
Age 65+ %
1.7%16.4%
Bachelor's+ %
42.1%17.4%
Diversity Index
56/1006/100
Economy
ZIP 40121
Fort Knox CDP, KY
View full profile →- Median Income$74,224
- Unemployment %10.4%
- IRS Net Migration+325
- Work From Home %3.4%
ZIP 40109
Brooks CDP, KY
View full profile →- Median Income$73,350
- Unemployment %5.5%
- IRS Net Migration+88
- Work From Home %16.3%
Visual comparison (same scale)
Median Income
$74,224$73,350
Unemployment %
10.4%5.5%
IRS Net Migration
+325+88
Work From Home %
3.4%16.3%
Housing
ZIP 40121
Fort Knox CDP, KY
View full profile →- Median Home Value—
- Median Rent$1,218
- Owner Occupied %0.7%
- Broadband %93.5%
- Vacant %10.8%
- Median Year Built1977
ZIP 40109
Brooks CDP, KY
View full profile →- Median Home Value$240k
- Median Rent—
- Owner Occupied %89.4%
- Broadband %73.3%
- Vacant %4.8%
- Median Year Built1986
Visual comparison (same scale)
Median Home Value
—$240k
Median Rent
$1,218—
Owner Occupied %
0.7%89.4%
Broadband %
93.5%73.3%
Vacant %
10.8%4.8%
Median Year Built
19771986
Climate & Location
ZIP 40121
Fort Knox CDP, KY
View full profile →- Snow Days/Year0 days
- Elevation (ft)615 ft
- Nearest Airport4.1 miles (6.6 km)
- Distance to Coast260.7 miles (419.6 km)
ZIP 40109
Brooks CDP, KY
View full profile →- Snow Days/Year0 days
- Elevation (ft)632 ft
- Nearest Airport7.4 miles (11.9 km)
- Distance to Coast255.9 miles (411.8 km)
Visual comparison (same scale)
Snow Days/Year
0 days0 days
Elevation (ft)
615 ft632 ft
Nearest Airport
4.1 miles (6.6 km)7.4 miles (11.9 km)
Distance to Coast
260.7 miles (419.6 km)255.9 miles (411.8 km)
Infrastructure
ZIP 40121
Fort Knox CDP, KY
View full profile →- Work From Home %3.4%
- Walkability (0–100)29
- Broadband %93.5%
ZIP 40109
Brooks CDP, KY
View full profile →- Work From Home %16.3%
- Walkability (0–100)22
- Broadband %73.3%
Visual comparison (same scale)
Work From Home %
3.4%16.3%
Walkability (0–100)
2922
Broadband %
93.5%73.3%
Frequently Asked Questions
How do ZIP 40121 and 40109 compare?
ZIP 40121 is wealthier, more diverse, more educated. ZIP 40109 is lower poverty rate, lower unemployment, higher work-from-home share.
What do the blue and orange colors mean?
Blue represents the first ZIP (40121), orange the second (40109). The same colors are used in the map markers and comparison bars.
Where does this data come from?
Data is from the U.S. Census Bureau and other federal sources. See our Methodology page for details.
How can I compare other ZIP codes?
From any ZIP page, use the "Compare with Another ZIP" tool, or go to /compare/XXXXX-vs-YYYYY (replace with two 5-digit ZIP codes).
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