ZIP Codes of Millard County, UT

Population & People
Population & People
Total Population
13,315
Household Income
Household Income
Median Income
$72,611
Housing
Housing
Total Housing Units
5,014
Business & Economy
Business & Economy
Total Businesses
299
Employment
Employment
Employment Rate
59.90%
Education
Education
Bachelor's Degree+
24.32%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 11 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:11 ZIP Codes (4 Standard, 7 PO Box, 0 Unique) [See All]
Area Code:435
Timezone:Mountain (GMT -07:00)
Local Time:11:55:25 PM
Population:13,315 [See All]
FIPS:49027
Land Area:3,180 sq mi
Water Area:5 sq mi
Coordinates:39.2102, -112.5083
Quick Link:
https://www.zip-codes.com/county/ut-millard.asp
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Utah's #17 most populous county
13,315 residents across 11 ZIPs — #17 of 29 Utah counties.

Standout ZIPs in this County


Most Populous
Delta · 5,948 people
44.7% of county total
Highest Income
Leamington · $95,625 median
1.3× county average
Largest Land Area
Delta · 1,028.0 sq mi
Spans the most ground
Fastest Growth
Delta · 6.8% (10-yr)
5,568 → 5,948 residents
Most Educated
Fillmore · 25.2% bachelor's+
436 of 1,730 adults 25+

Things worth knowing about Millard County


13,315 residents live across 11 ZIPs covering 3,180 sq mi, served by 11 distinct USPS-recognized cities.

Population moved from 12,549 to 13,040 from 2014 to 2024 — a +3.9% change. 6 ZIPs gained residents, 4 lost.

The county's wealthiest ZIP 84638 (Leamington, $95,625 median) and poorest ZIP 84644 (Meadow, $48,750) are 48.6 miles apart — a 2.0× income gap across local geography.

Median home values vary 1.6× across this county — from $205,000 in 84635 (Hinckley) to $335,900 in 84637 (Kanosh).

Density varies 39× across the county — from 2 people/sq mi in 84644 (Meadow) to 80 in 84638 (Leamington).

Educational attainment ranges from 17.3% bachelor's+ in 84656 (Scipio) to 38.3% in 84638 (Leamington) — the breadth of educational profiles across the area.

Within Utah, this is the #17 most populous of 29 counties and ranks #20 for median household income with the #20 fastest decade growth .

Weighted by population, the typical household earns about $73,737 across the county — reflecting what a typical resident sees, not a simple ZIP average.

24.3% of adults age 25+ hold a bachelor's degree or higher (1,970 of 8,099 reporting).

4 Standard delivery, 7 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Millard County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
3,180
square miles
Avg density
4.2
people per sq mi
Population
13,315
across 11 ZIPs
Delta
1,028.0 sq mi
5,948 residents
Garrison
874.8 sq mi
44 residents
Fillmore
326.6 sq mi
3,196 residents

All ZIP Codes in Millard County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
84624DeltaStandard5,948$75,4691,028.06.8%
84631FillmoreStandard3,196$67,115326.6-2.7%
84635HinckleyStandard938$82,813103.942.1%
84649Oak CityPO Box854$73,479139.7-7.0%
84637KanoshPO Box598$80,357245.36.0%
84636HoldenPO Box518$72,500169.123.9%
84656ScipioPO Box466$75,313121.17.6%
84638LeamingtonPO Box354$95,6254.426.0%
84644MeadowPO Box275$48,750134.7
84640LynndylPO Box124$54,68832.0-33.3%
84728GarrisonStandard44874.8-81.4%

Adjacent & Nearby Counties