Prospect, KY ZIP Codes Explained: 40059 and the ZIPs Around It
By Spencer Lowe, Real Estate Go To · Licensed Kentucky real estate agent since 2019 · Updated October 10, 2026
Key Takeaway / Quick Answer: Prospect, KY's ZIP code is 40059. It covers roughly 26 to 28 square miles across Jefferson and Oldham counties, far more than the roughly 3.9-square-mile City of Prospect. Neighboring ZIPs include 40241 and 40245 in Louisville, 40014 in Crestwood and 40026 in Goshen, each with different prices and county lines.
If you're searching for homes by Prospect, KY ZIP code, you've probably run into the confusing part: a 40059 address doesn't tell you the city, the county or the school district. That makes it easy to fall for a house and then learn it's not where you thought. I'm Spencer Lowe, a Kentucky real estate agent licensed since 2019 with Real Estate Go To, serving Prospect, KY and the Louisville area. This guide explains what 40059 actually covers, how it differs from the City of Prospect, and how the ZIP codes around it compare, using GLAR MLS sales data. For the full overview, see Spencer Lowe, Prospect KY real estate agent.
What Is the ZIP Code for Prospect, KY?
- It covers parts of Jefferson County (its primary county) and Oldham County, and "River Bluff" is also an accepted city name for it (ZIP-Codes.com). The 40059 ZIP had about 20,000 residents in the 2020 Census and covers roughly 26 to 28 square miles of land (ZIP-Codes.com, using U.S. Census data).
Is 40059 the Same as the City of Prospect?
No. The City of Prospect is a home rule-class city in Jefferson and Oldham counties, incorporated in 1974 (Kentucky Secretary of State), covering about 3.9 square miles (Wikipedia: Prospect, Kentucky). The ZIP is roughly seven times the size of the city, and the Prospect postal address reaches east to the Norton Commons development in Worthington (Wikipedia).
What Changes From One 40059 Address to the Next?
A "Prospect, KY 40059" address tells you the post office, not the city, county or school district. Three things can change:
- County: Jefferson or Oldham, which affects property tax rates and county services. See Property Taxes in Prospect, KY.
- City limits: Inside the City of Prospect, the city provides weekly back-door trash pickup, weekly yard waste pickup and every-other-week curbside recycling (City of Prospect). Outside the city, confirm who provides it.
- Schools: Jefferson County Public Schools on the Jefferson side and Oldham County Schools on the Oldham side. See Jefferson County vs Oldham County Schools.
The quickest way to confirm the county is the property record: the Jefferson County PVA or the Oldham County PVA.
What ZIP Codes Are Near Prospect, KY?
ZIP-Codes.com lists 40241 (Louisville), 40026 (Goshen), 40014 (Crestwood) and 40222 (Louisville) among the ZIPs adjacent to 40059, along with two Indiana ZIPs across the Ohio River (ZIP-Codes.com). 40245 isn't listed as directly adjacent, but it's one of the East End ZIPs I serve, so I've included it.
| ZIP code | Post office name | Counties (primary first) | 2020 Census population | Median sold price, Sept 2026 | Homes sold, Oct 2025 - Sep 2026 |
|---|---|---|---|---|---|
| 40059 | Prospect | Jefferson, Oldham | About 20,000 | $654,000 | 445 |
| 40241 | Louisville | Jefferson, Oldham | 31,016 | $382,500 | 419 |
| 40245 | Louisville | Jefferson, Oldham, Shelby | 37,866 | $432,950 | 706 |
| 40014 | Crestwood | Oldham, Jefferson | 22,255 | $411,750 | 268 |
| 40026 | Goshen | Oldham | 6,177 | $545,000 | 92 |
Counties and population: ZIP-Codes.com pages for 40059, 40241, 40245, 40014 and 40026, using U.S. Census 2020 data. Prices and sales: GLAR MLS via Flexmls, residential.
These are single-month medians, and some ZIPs had only a handful of sales that month; 40026 had 6 in September 2026 (GLAR MLS via Flexmls). Use the 12-month sales count to judge how much activity each ZIP has.
40241 - Louisville
Mostly in Jefferson County with a portion in Oldham County. Its accepted place names include Barbourmeade, Brownsboro Farm, Hills and Dales, Lyndon and Ten Broeck (ZIP-Codes.com). Median sold price $382,500 in September 2026, with 419 sales over the past 12 months (GLAR MLS via Flexmls).
40245 - Louisville (East End)
The largest of these ZIPs by population, at 37,866 in the 2020 Census, touching Jefferson, Oldham and Shelby counties. Accepted place names include Coldstream and Worthington Hills (ZIP-Codes.com). It had the most sales of the group: 706 over the past 12 months, with a September 2026 median of $432,950 (GLAR MLS via Flexmls).
40014 - Crestwood
Mostly in Oldham County with a portion in Jefferson County. Accepted place names include Ballardsville and Orchard Grass Hills (ZIP-Codes.com). Median sold price $411,750 in September 2026, with 268 sales over the past 12 months (GLAR MLS via Flexmls).
40026 - Goshen
Entirely in Oldham County, with 6,177 residents in the 2020 Census (ZIP-Codes.com). The smallest market of the group, with 92 sales over the past 12 months (GLAR MLS via Flexmls). For more on the town, see Prospect vs Goshen, Anchorage & Middletown.
How Should You Search for Homes in Prospect?
By what matters to you, not by ZIP. A 40059 search pulls in plenty of homes outside the City of Prospect, and it won't sort by county or school district. Start with county, schools, commute, lot size and price, then search by map and subdivision. For current prices inside 40059, see my Prospect, KY housing market update.
Your 3-Step Plan for Using Prospect ZIP Codes
- Decide what matters most: county, city limits, schools, commute or price.
- Search by map and subdivision, not just by ZIP code.
- Confirm every address on the PVA record and with the school district before you make an offer.
Shopping in Prospect? Start with the neighborhoods
My free Prospect Neighborhood Guide compares what homes actually sold for, plus HOA dues, across 20 Prospect neighborhoods, built from a year of GLAR MLS sales. Instant download.
Get the free neighborhood guideAlready own in Prospect? Get the free market snapshot.
What's at Stake if You Search by ZIP Alone?
A 40059 search mixes two counties, two school districts, homes inside and outside city limits, and price points from condos to estates. If you rely on the ZIP, you can spend weeks touring homes that don't fit. Done right, you search the specific areas that match your priorities and confirm each address before you get attached.
Related reading: Moving to Prospect, KY From Louisville: What Changes and What Doesn't
Frequently Asked Questions About Prospect, KY ZIP Codes
Q: What ZIP code is Prospect, KY?
The ZIP code for Prospect, KY is 40059. It covers parts of Jefferson County and Oldham County, and River Bluff is also an accepted city name for the ZIP.
Q: Is 40059 in Jefferson County or Oldham County?
Both. Jefferson County is the primary county for 40059, and part of the ZIP is in Oldham County. Check the county PVA property record to confirm the county for a specific address.
Q: Does a 40059 address mean the home is in the City of Prospect?
Not necessarily. The 40059 ZIP covers roughly 26 to 28 square miles of land, while the City of Prospect covers about 3.9 square miles. Many 40059 addresses are outside city limits.
Q: What ZIP codes are near Prospect, KY?
ZIP codes around 40059 include 40241 and 40222 in Louisville, 40014 in Crestwood and 40026 in Goshen. The 40245 East End ZIP is also nearby, though not directly adjacent.
Q: Which Prospect-area ZIP has the most home sales?
Among 40059, 40241, 40245, 40014 and 40026, the 40245 ZIP had the most residential sales from October 2025 through September 2026, with 706, according to GLAR MLS data. 40059 had 445.
Not Sure Which Prospect-Area ZIP Fits You?
Start with the neighborhoods. Grab my free Prospect Neighborhood Guide, or call or text Spencer Lowe at +1-502-974-0099 and I'll help you match the area to your county, school and price priorities. You can also visit https://spencerlowerealestate.com for a personal consultation.
Data sources: GLAR MLS via Flexmls, residential, ZIPs 40059, 40241, 40245, 40014 and 40026, September 2026 and October 2025 - September 2026, pulled October 10, 2026 - deemed reliable but not guaranteed; ZIP-Codes.com (U.S. Census 2020 data); Kentucky Secretary of State; City of Prospect; Jefferson County PVA; Oldham County PVA; Wikipedia. Images: Wikimedia Commons (credits in captions). Information changes; verify details before making decisions.
Disclaimer: This article is general information, not legal, tax, financial or lending advice. Market data is from the GLAR MLS via Flexmls and the other sources listed above; it is deemed reliable but not guaranteed, and it changes over time. Verify school assignments, property taxes, HOA rules, flood zones and other details with the appropriate office, lender, attorney or tax professional before making decisions.
Spencer Lowe is a real estate agent licensed in Kentucky since 2019 with Real Estate Go To. (502) 974-0099. Equal Housing Opportunity.