42048 ZIP Code, Hardin, KY

42048 is a ZIP code in Hardin, Kentucky — mostly in Marshall County (93% of its land), with smaller parts in Calloway County. It covers 27 square miles of land. The closest ZIP codes are 42036, 42020 and 42025. 2,083 people live here in 802 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (79%). Median household income is $55,714, below the Kentucky median of $63,726.

Quick facts

Key figures

MeasureValue
Residents2,083
Households802
Median household income$55,714
Income per person$25,203
Median age39.5
Homeowners79.3%
Median home value$138,800
Median rent$803
Bachelor's degree or higher24.1%
Average commute (minutes)33.1
Households with kids under 1836.3%
Moved in the past year12.1%
Below the poverty line26.9%
Broadband internet79.4%
Speak a non-English language at home1.1%

Household income

% of householdsValue
<$10K10.5%
$10–15K5.4%
$15–25K9.6%
$25–35K17.7%
$35–50K6.4%
$50–75K14.5%
$75–100K12.2%
$100–150K15.7%
$150–200K2.7%
$200K+5.4%

Age

% of all residentsValue
<1012.8%
10–1915.6%
20–246.0%
25–3410.9%
35–4412.4%
45–5412.8%
55–648.0%
65–7413.8%
75+7.7%

Tenure

% of housing unitsValue
Owned, with mortgage35.7%
Owned outright20.7%
Rented14.2%
Vacant29.3%

Type of building

% of housing unitsValue
Detached house65.7%
Townhome0.0%
2–4 units1.2%
5–19 units2.2%
20+ units0.7%
Mobile / other30.2%

Businesses in 42048

36 business establishments with 331 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

42048 has 2 USPS carrier routes with 1,097 residential and 39 business mailboxes. Open the EDDM route map.

Carrier routes in 42048

42048 has 2 USPS carrier routes (2 rural (R)) with 1,097 residential and 39 business mailboxes. Routes range from 523 homes (R019) to 574 homes (R018); the median route has 549 homes. The Census counted 802 households in 42048 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2490
250–4990
500–7492
750–9990
1,000–1,4990
1,500+0

Best routes in 42048 for…

Most businesses

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

  1. Route R018 — USPS business mailboxes 26, 574 homes
  2. Route R019 — USPS business mailboxes 13, 523 homes

Select these 2 routes on the route map

Every carrier route in 42048

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
R018Rural57426$40,813———
R019Rural52313$63,369———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 42048 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 42048

Where it ranks

Mail every home in 42048

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) 42048, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 42048 in?
42048 is a Hardin, KY mailing address. By land area, 3% lies inside Hardin; the rest is outside any Census-defined city or community.
What county is 42048 in?
42048 is mostly in Marshall County (93% of its land), with smaller parts in Calloway County.
What is the population of 42048?
About 2,083 people (±415), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 2,177.
What is the median household income in 42048?
$55,714 (±$30,904), 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 42048?
2 USPS carrier routes with 1,097 residential and 39 business mailboxes (1,136 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 42048?
The closest, measured center to center: 42036 (4.5 mi, Dexter), 42020 (4.6 mi, Dexter), 42025 (7.7 mi, Benton), 42054 (7.7 mi), 42071 (9.2 mi, Murray) and 42044 (14.3 mi, Calvert City).

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