Middletown, KY ZIP Codes
3 ZIP codes serve Middletown, Kentucky: 40299, 40223 and 40243. Together they are home to 77,007 residents in 32,875 households. That is more than the 9,763 people counted inside Middletown city limits, because these ZIP codes reach past its boundary. Median household income ranges from $77,587 in 40243 to $96,607 in 40223.
Middletown city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 9,763 |
| Households | 4,405 |
| Median household income | $82,537 |
| Median home value | $336,000 |
| Median age | 42 |
| Median rent | $1,502 |
All 3 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 77,007 |
| Households (sum of ZIP codes) | 32,875 |
| Median household income, range across ZIP codes | $77,587 (40243) to $96,607 (40223) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $89,544 |
| Homeowners | 72.1% |
| Households with kids under 18 | 26.2% |
| Moved in the past year | 12.1% |
| Carrier routes in EDDM2GO's route library | 56 routes, 30,918 homes (2 of 3 ZIP codes) |
Top facts
- Highest median household income in Middletown: 40223 ($96,607)
- Most residents: 40299 (42,207 people)
- Highest homeownership: 40299 (74.8% own their home)
- Most households with kids: 40299 (28.7% of households)
- Most new movers: 40243 (16.6% moved in last year)
- Youngest median age: 40299 (40.0 years)
- Highest median home value: 40223 ($362,500)
Every ZIP code in Middletown
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 40299 | Louisville | 42,207 | 17,163 | $89,440 | $290,200 | 74.8% | 28.7% | 10.4% | 35 | 21,490 | 1% of its land |
| 40223 | Louisville | 22,798 | 9,971 | $96,607 | $362,500 | 72.5% | 23.9% | 12.9% | 21 | 12,628 | 10% of its land |
| 40243 | Louisville | 12,002 | 5,741 | $77,587 | $323,200 | 63.1% | 22.5% | 16.6% | — | — | 68% of its land |
A ZIP code is listed for Middletown when at least 10% of its land lies inside Middletown city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Middletown. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Middletown.
Counties
- Jefferson County — 39 ZIP codes
Nearby cities sharing these ZIP codes
- Louisville/Jefferson County metro government (balance) — 23 ZIP codes
- Jeffersontown — 3 ZIP codes
- Lyndon — 3 ZIP codes
- Douglass Hills — 2 ZIP codes
Price a mailing to Middletown ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Middletown, KY?
- 40299, 40223 and 40243. A ZIP code is listed for Middletown when at least 10% of its land lies inside Middletown city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Middletown.
- What is the population of Middletown, KY?
- The Census Bureau counts 9,763 residents inside Middletown city limits (ACS 2020–2024). The 3 ZIP codes that serve Middletown hold 77,007 residents in all.
- What is the median household income in Middletown, KY?
- $82,537 inside Middletown city limits, per the Census Bureau. Across its ZIP codes the medians run from $77,587 to $96,607.
- Which Middletown ZIP code has the highest median household income?
- 40223, at $96,607, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Middletown, KY?
- For the 2 of 3 ZIP codes in EDDM2GO's stored route library: 56 carrier routes reaching 30,918 residential and 3,198 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.