40068 ZIP Code, Smithfield, KY

40068 is a ZIP code in Smithfield, Kentucky — mostly in Henry County (69% of its land), with smaller parts in Shelby and Oldham counties. It covers 43 square miles of land. The closest ZIP codes are 40019, 40070 and 40031. 2,570 people live here in 922 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (89%). Median household income is $80,750, above the Kentucky median of $63,726; the median age is 45.2, older than most ZIP codes.

Quick facts

Key figures

MeasureValue
Residents2,570
Households922
Median household income$80,750
Income per person$43,288
Median age45.2
Homeowners89.4%
Median home value$325,300
Median rent$1,036
Bachelor's degree or higher30.9%
Average commute (minutes)29.3
Households with kids under 1829.3%
Moved in the past year8.2%
Below the poverty line12.7%
Broadband internet88.7%
Speak a non-English language at home1.2%

Household income

% of householdsValue
<$10K2.1%
$10–15K1.1%
$15–25K4.4%
$25–35K14.2%
$35–50K7.6%
$50–75K15.4%
$75–100K14.4%
$100–150K15.6%
$150–200K10.8%
$200K+14.3%

Age

% of all residentsValue
<1010.9%
10–199.2%
20–245.8%
25–349.5%
35–4414.2%
45–5416.8%
55–6415.9%
65–7412.2%
75+5.5%

Tenure

% of housing unitsValue
Owned, with mortgage59.9%
Owned outright28.5%
Rented10.3%
Vacant1.3%

Type of building

% of housing unitsValue
Detached house84.0%
Townhome2.2%
2–4 units0.0%
5–19 units0.0%
20+ units0.0%
Mobile / other13.7%

Businesses in 40068

36 business establishments with 254 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

40068 has 2 USPS carrier routes with 1,074 residential and 20 business mailboxes. Open the EDDM route map.

Carrier routes in 40068

40068 has 2 USPS carrier routes (2 rural (R)) with 1,074 residential and 20 business mailboxes. Routes range from 536 homes (R004) to 538 homes (R005); the median route has 537 homes. The Census counted 922 households in 40068 (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 40068 for…

Most businesses

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

  1. Route R004 — USPS business mailboxes 17, 536 homes
  2. Route R005 — USPS business mailboxes 3, 538 homes

Select these 2 routes on the route map

Every carrier route in 40068

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
R004Rural53617$159,317———
R005Rural5383$121,853———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 40068 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 40068

Where it ranks

Mail every home in 40068

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) 40068, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 40068 in?
40068 is a Smithfield, KY mailing address. None of its land lies inside a Census-defined city or community.
What county is 40068 in?
40068 is mostly in Henry County (69% of its land), with smaller parts in Shelby and Oldham counties.
What is the population of 40068?
About 2,570 people (±440), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 2,752.
What is the median household income in 40068?
$80,750 (±$14,800), 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 40068?
2 USPS carrier routes with 1,074 residential and 20 business mailboxes (1,094 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 40068?
The closest, measured center to center: 40019 (6.1 mi, Eminence), 40070 (6.4 mi), 40031 (6.8 mi, La Grange), 40058 (7 mi, New Castle), 40050 (7.5 mi, New Castle) and 40055 (7.7 mi).

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