42066 ZIP Code, Mayfield, KY

42066 is a ZIP code in Mayfield, Kentucky in Graves County. It covers 217 square miles of land. The closest ZIP codes are 42051, 42088 and 42039. 23,917 people live here in 9,517 households, more than in 9 of every 10 Kentucky ZIP codes. With about 110 people per square mile it is lightly settled, and most homes are owner-occupied (72%). Median household income is $48,664, below the Kentucky median of $63,726.

Quick facts

Key figures

MeasureValue
Residents23,917
Households9,517
Median household income$48,664
Income per person$32,294
Median age39.8
Homeowners72.2%
Median home value$145,600
Median rent$774
Bachelor's degree or higher19.9%
Average commute (minutes)19
Households with kids under 1831.9%
Moved in the past year11.1%
Below the poverty line21.1%
Broadband internet83.2%
Speak a non-English language at home7.3%

Household income

% of householdsValue
<$10K9.5%
$10–15K4.5%
$15–25K9.6%
$25–35K11.8%
$35–50K16.2%
$50–75K17.6%
$75–100K9.0%
$100–150K10.4%
$150–200K5.4%
$200K+6.0%

Age

% of all residentsValue
<1014.1%
10–1912.6%
20–244.8%
25–3412.6%
35–4412.9%
45–5410.3%
55–6413.9%
65–7410.6%
75+8.1%

Tenure

% of housing unitsValue
Owned, with mortgage35.3%
Owned outright27.5%
Rented23.6%
Vacant13.5%

Type of building

% of housing unitsValue
Detached house80.2%
Townhome1.3%
2–4 units7.1%
5–19 units1.1%
20+ units1.1%
Mobile / other9.2%

Businesses in 42066

525 business establishments with 7,123 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

42066 has 17 USPS carrier routes with 9,942 residential and 613 business mailboxes. Open the EDDM route map.

Carrier routes in 42066

42066 has 17 USPS carrier routes (7 city (C), 10 rural (R)) with 9,942 residential and 613 business mailboxes. Routes range from 394 homes (C008) to 782 homes (R001); the median route has 579 homes. The Census counted 9,517 households in 42066 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2490
250–4993
500–74912
750–9992
1,000–1,4990
1,500+0

Best routes in 42066 for…

Most businesses

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

  1. Route R009 — USPS business mailboxes 146, 539 homes
  2. Route R011 — USPS business mailboxes 100, 623 homes
  3. Route C005 — USPS business mailboxes 86, 443 homes
  4. Route C008 — USPS business mailboxes 86, 394 homes
  5. Route C004 — USPS business mailboxes 55, 763 homes

Select these 5 routes on the route map

Every carrier route in 42066

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C004City76355$32,125———
C005City44386$13,739———
C006City4866$55,465———
C007City52812$75,910———
C008City39486$13,739———
C009City52111$32,125———
C010City55610$75,910———
R001Rural7828$60,759———
R002Rural6558$65,500———
R003Rural72013$60,759———
R004Rural60721$57,913———
R005Rural59313$57,706———
R006Rural55210$57,706———
R007Rural60116$65,500———
R008Rural57912$60,177———
R009Rural539146$41,000———
R011Rural623100$54,050———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 42066 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 42066

Where it ranks

Mail every home in 42066

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) 42066, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 42066 in?
42066 is a Mayfield, KY mailing address. By land area, 3% lies inside Mayfield; the rest is outside any Census-defined city or community.
What county is 42066 in?
42066 is in Graves County.
What is the population of 42066?
About 23,917 people (±1,027), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 23,081.
What is the median household income in 42066?
$48,664 (±$3,385), 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 42066?
17 USPS carrier routes with 9,942 residential and 613 business mailboxes (10,556 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 42066?
The closest, measured center to center: 42051 (8.8 mi, Hickory), 42088 (10.2 mi, Wingo), 42039 (11 mi, Fancy Farm), 42054 (11.5 mi), 42040 (11.6 mi, Farmington) and 42061 (12.5 mi, Lowes).

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