Residential delivery area · Missouri
ZIP Code 63084: Union, MO
ZIP code 63084 uses the postal name Union, Missouri and lies entirely in Franklin County (Census 2020 ZIP-county file). About 21,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $75,992 (Census Bureau, ACS 2020-2024). By Census place, 12% of its land lies in Union; 88% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Union · its only residential ZIP
- County
- Franklin County
- Census places
- Union
- Metro area
- St. Louis, MO-IL
- House district
- MO-2 119th Congress
- State
- Missouri
- Time zone
- Central
- Land area
- 76.3 sq mi · 272 people per sq mi
Where is ZIP code 63084?
63084 centers on 38.422°, -91.019° and covers 76.3 square miles of land plus 0.1 of water. It borders 5 ZIP codes: 63077, 63013, 63090, 63089, 63072.
The map draws ZIP code areas only. For the streets inside 63084, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 63084 compare with the rest of Franklin County?
| Measure | 63084 | In Franklin County | In MO |
|---|---|---|---|
| People (ACS 2020-2024) | 20,708 | 2nd of 23 | 94th of 1,035 |
| Median household income | $76k | 8th of 13 | 160th of 479 |
| Median home value | $227k | 8th of 15 | 179th of 494 |
Its median household income is higher than in 56% of U.S. residential ZIP codes, and it is denser than 66% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 63084?
The 2020 Census counted 19,500 people in 63084; the ACS, which samples households over 2020-2024, estimates 20,708. Between the 2010 and 2020 censuses its population grew 12.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 20,708
- 2020 Census count
- 19,500+12.0% since 2010 (17,414)
- Households
- 7,962
- Median age
- 36.7
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 63084?
Of the 20,708 people the ACS estimates in 63084, 23.8% are under 18 and 15.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (87.3%).
- Under 1823.8%
- 18 to 6460.4%
- 65 and older15.8%
- White, not Hispanic87.3%
- Other or two or more7.9%
- Hispanic or Latino2.5%
- Black, not Hispanic1.4%
- Asian, not Hispanic0.9%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 63084 earn?
Median household income is $75,992 (ACS 2020-2024), the 8th highest of the 13 ranked ZIP codes in Franklin County. It is not measurably different from 2015-2019 ($70,807 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $75,992
- Income per person
- $33,479
- Below the poverty line
- 7.4%
- Unemployed (of the labor force)
- 5.6%
- Adults 25+ with a bachelor's degree
- 21.6%
- Adjusted gross income per tax return, 2022
- $61,7429,430 returns; wages 73% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 63084?
FHFA's house price index for 63084, built from repeat sales and appraisals of the same homes, rose 85% from 2015 to 2025 and rose 58% from 2020 to 2025, and moved +8.9% in 2025.
- Median home value (owners' estimate)
- $226,900
- Median gross rent
- $855
- Homes owned by their occupants
- 71.3%
- Housing units
- 8,765
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 63084?
497 business establishments had a location in this ZIP code in 2023, 23 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction70
- Other services (except public administration)64
- Retail trade63
- Health care and social assistance55
- Manufacturing44
- Professional, scientific, and technical services44
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 63084?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 63077 | Saint Clair | 11,391 | $56k | 6.7 mi |
| 63013 | Beaufort | 1,136 | $99k | 7.3 mi |
| 63090 | Washington | 23,258 | $85k | 8.0 mi |
| 63089 | Villa Ridge | 5,662 | $73k | 8.1 mi |
| 63072 | Robertsville | 3,469 | $80k | 11.5 mi |
| 63039 | Gray Summit | 986 | $70k | 10.7 mi (near) |
| 63056 | Leslie | 1,896 | $76k | 10.7 mi (near) |
| 63079 | Stanton | 60 | – | 11.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.