40503 ZIP Code, Lexington, KY

40503 is a ZIP code in Lexington, Kentucky in Fayette County. It covers 8.8 square miles of land. The closest ZIP codes are 40536, 40514 and 40526. 27,451 people live here in 12,615 households, more than in 9 of every 10 Kentucky ZIP codes. At about 3,107 people per square mile it has suburban density, and owners and renters are mixed (62% own). Median household income is $76,482, above the Kentucky median of $63,726.

Quick facts

Key figures

MeasureValue
Residents27,451
Households12,615
Median household income$76,482
Income per person$48,091
Median age37.2
Homeowners61.7%
Median home value$296,800
Median rent$1,168
Bachelor's degree or higher56.4%
Average commute (minutes)18.6
Households with kids under 1821.4%
Moved in the past year17.1%
Below the poverty line12.7%
Broadband internet94.6%
Speak a non-English language at home12.9%

Household income

% of householdsValue
<$10K5.2%
$10–15K2.9%
$15–25K5.5%
$25–35K7.9%
$35–50K9.3%
$50–75K18.0%
$75–100K13.0%
$100–150K17.4%
$150–200K10.1%
$200K+10.7%

Age

% of all residentsValue
<1010.8%
10–199.0%
20–2411.1%
25–3416.3%
35–4412.7%
45–5411.3%
55–6411.8%
65–7410.1%
75+7.0%

Tenure

% of housing unitsValue
Owned, with mortgage37.8%
Owned outright20.9%
Rented35.7%
Vacant5.5%

Type of building

% of housing unitsValue
Detached house69.2%
Townhome4.3%
2–4 units4.0%
5–19 units13.7%
20+ units8.3%
Mobile / other0.5%

Businesses in 40503

1,500 business establishments with 24,522 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

40503 has 29 USPS carrier routes with 12,955 residential and 1,669 business mailboxes. Open the EDDM route map.

Carrier routes in 40503

40503 has 29 USPS carrier routes (29 city (C)) with 12,955 residential and 1,669 business mailboxes. Routes range from 133 homes (C026) to 834 homes (C098); the median route has 443 homes. The Census counted 12,615 households in 40503 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2492
250–49917
500–7499
750–9991
1,000–1,4990
1,500+0

Best routes in 40503 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

  1. Route C040 — USPS business mailboxes 242, 569 homes
  2. Route C026 — USPS business mailboxes 231, 133 homes
  3. Route C002 — USPS business mailboxes 205, 259 homes
  4. Route C022 — USPS business mailboxes 137, 208 homes
  5. Route C042 — USPS business mailboxes 136, 303 homes

Select these 5 routes on the route map

Every carrier route in 40503

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C001City3211$167,897———
C002City259205$62,555———
C003City49459$118,022———
C005City4512$84,221———
C006City284136$78,302———
C007City59623$52,317———
C009City54231$61,079———
C010City4460$78,302———
C016City6381$67,716———
C020City5925$67,716———
C021City6682$67,716———
C022City208137$116,629———
C023City42172$90,412———
C025City251113$90,412———
C026City133231$78,302———
C033City4029$52,317———
C036City35154$84,225———
C040City569242$61,079———
C042City303136$61,079———
C043City6673$116,629———
C053City44050$47,653———
C060City56711$82,663———
C064City5173$84,225———
C070City3976$46,252———
C071City44327$90,412———
C080City4221$118,022———
C098City83448$46,252———
C100City28054$128,871———
C101City4597$90,412———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 40503 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

Areas that include 40503

Where it ranks

Mail every home in 40503

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 40503, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 40503 in?
40503 is a Lexington, KY mailing address. By land area, 100% lies inside Lexington-Fayette urban county.
What county is 40503 in?
40503 is in Fayette County.
What is the population of 40503?
About 27,451 people (±1,327), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 28,073.
What is the median household income in 40503?
$76,482 (±$3,853), compared with $63,726 for Kentucky as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 40503?
29 USPS carrier routes with 12,955 residential and 1,669 business mailboxes (14,623 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 40503?
The closest, measured center to center: 40536 (2.2 mi, Lexington-Fayette urban county, KY), 40514 (2.3 mi, Lexington-Fayette urban county, KY), 40526 (2.4 mi, Lexington-Fayette urban county, KY), 40504 (2.6 mi, Lexington-Fayette urban county, KY), 40502 (2.8 mi, Lexington-Fayette urban county, KY) and 40517 (2.9 mi, Lexington-Fayette urban county, KY).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.