40121 vs 42788 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 40121, Orange = ZIP 42788.
Quick verdict: ZIP 40121 is wealthier, lower poverty rate, more diverse, more educated. ZIP 42788 is 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 42788
KY
View full profile →- Population339
- Median Income$53,668
- Median Home Value$223k
- Median Rent—
- Median Age41.4 yrs
- Poverty Rate15.9%
Visual comparison (same scale)
Population
8,715339
Median Income
$74,224$53,668
Median Home Value
—$223k
Median Rent
$1,218—
Median Age
24.3 yrs41.4 yrs
Poverty Rate
8.0%15.9%
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 42788
KY
View full profile →- White %89.4%
- Black %6.8%
- Asian %0.0%
- Hispanic %0.0%
- Age 0–17 %8.6%
- Age 18–64 %78.2%
- Age 65+ %13.3%
- Bachelor's+ %14.8%
- Diversity Index20/100
Visual comparison (same scale)
White %
59.4%89.4%
Black %
16.0%6.8%
Asian %
2.3%0.0%
Hispanic %
25.1%0.0%
Age 0–17 %
32.3%8.6%
Age 18–64 %
66.0%78.2%
Age 65+ %
1.7%13.3%
Bachelor's+ %
42.1%14.8%
Diversity Index
56/10020/100
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 42788
KY
View full profile →- Median Income$53,668
- Unemployment %0.0%
- IRS Net Migration+13
- Work From Home %5.7%
Visual comparison (same scale)
Median Income
$74,224$53,668
Unemployment %
10.4%0.0%
IRS Net Migration
+325+13
Work From Home %
3.4%5.7%
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 42788
KY
View full profile →- Median Home Value$223k
- Median Rent—
- Owner Occupied %100.0%
- Broadband %100.0%
- Vacant %0.0%
- Median Year Built2001
Visual comparison (same scale)
Median Home Value
—$223k
Median Rent
$1,218—
Owner Occupied %
0.7%100.0%
Broadband %
93.5%100.0%
Vacant %
10.8%0.0%
Median Year Built
19772001
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 42788
KY
View full profile →- Snow Days/Year0 days
- Elevation (ft)600 ft
- Nearest Airport26.3 miles (42.3 km)
- Distance to Coast287.8 miles (463.1 km)
Visual comparison (same scale)
Snow Days/Year
0 days0 days
Elevation (ft)
615 ft600 ft
Nearest Airport
4.1 miles (6.6 km)26.3 miles (42.3 km)
Distance to Coast
260.7 miles (419.6 km)287.8 miles (463.1 km)
Infrastructure
ZIP 40121
Fort Knox CDP, KY
View full profile →- Work From Home %3.4%
- Walkability (0–100)29
- Broadband %93.5%
Visual comparison (same scale)
Work From Home %
3.4%5.7%
Walkability (0–100)
29—
Broadband %
93.5%100.0%
Frequently Asked Questions
How do ZIP 40121 and 42788 compare?
ZIP 40121 is wealthier, lower poverty rate, more diverse, more educated. ZIP 42788 is lower unemployment, higher work-from-home share.
What do the blue and orange colors mean?
Blue represents the first ZIP (40121), orange the second (42788). 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).
Continue exploring