Residential delivery area · Missouri
ZIP Code 63034: Old Jamestown (Florissant), MO
ZIP code 63034 is in Old Jamestown (postal name Florissant), Missouri, entirely in St. Louis County (Census 2020 ZIP-county file). About 19,000 people live there (Census Bureau, ACS 2020-2024), the least populous of Florissant's 3 residential ZIP codes. Median household income is $103,905 (Census Bureau, ACS 2020-2024). By Census place, 78% of its land lies in Old Jamestown (a census-designated place); 22% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Florissant · 3 residential ZIPs
- County
- St. Louis County
- Census places
- Old Jamestown census-designated place
- Metro area
- St. Louis, MO-IL
- House district
- MO-1 119th Congress
- State
- Missouri
- Time zone
- Central
- Land area
- 18.7 sq mi · 1,009 people per sq mi
- PO Box ZIPs
- 63032 also use the name Florissant
Where is ZIP code 63034?
63034 centers on 38.845°, -90.288° and covers 18.7 square miles of land plus 1.5 of water. It borders 5 ZIP codes: 63033, 63386, 63031, 63138, 63301.
The map draws ZIP code areas only. For the streets inside 63034, 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 63034 compare with the rest of Florissant?
| Measure | 63034 | In Florissant | In St. Louis County | In MO |
|---|---|---|---|---|
| People (ACS 2020-2024) | 18,908 | 3rd of 3 | 23rd of 47 | 103rd of 1,035 |
| Median household income | $104k | 1st of 3 | 16th of 44 | 36th of 479 |
| Median home value | $239k | 1st of 3 | 26th of 45 | 151st of 494 |
Its median household income is higher than in 83% of U.S. residential ZIP codes, and it is denser than 78% 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 63034?
The 2020 Census counted 18,428 people in 63034; the ACS, which samples households over 2020-2024, estimates 18,908. Between the 2010 and 2020 censuses its population grew 3.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 18,908
- 2020 Census count
- 18,428+3.8% since 2010 (17,761)
- Households
- 6,670
- Median age
- 41.9
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 63034?
Of the 18,908 people the ACS estimates in 63034, 24.7% are under 18 and 19.4% are 65 or older. The largest group by race and Hispanic origin is Black (not Hispanic) (66.0%), then White (not Hispanic) (21.2%).
- Under 1824.7%
- 18 to 6456.0%
- 65 and older19.4%
- Black, not Hispanic66.0%
- White, not Hispanic21.2%
- Other or two or more6.8%
- Hispanic or Latino4.6%
- Asian, not Hispanic1.5%
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 63034 earn?
Median household income is $103,905 (ACS 2020-2024), the 16th highest of the 44 ranked ZIP codes in St. Louis County. It is not measurably different from 2015-2019 ($116,732 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $103,905±$10,486
- Income per person
- $43,784
- Below the poverty line
- 6.1%
- Unemployed (of the labor force)
- 5.2%
- Adults 25+ with a bachelor's degree
- 40.8%
- Adjusted gross income per tax return, 2022
- $71,8609,360 returns; wages 70% 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 63034?
FHFA's house price index for 63034, built from repeat sales and appraisals of the same homes, rose 84% from 2015 to 2025 and rose 52% from 2020 to 2025, and moved +10.6% in 2025.
- Median home value (owners' estimate)
- $239,300
- Median gross rent
- $1,825
- Homes owned by their occupants
- 91.0%
- Housing units
- 6,727
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 63034?
176 business establishments had a location in this ZIP code in 2023, 33 fewer than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance66
- Other services (except public administration)21
- Transportation and warehousing15
- Professional, scientific, and technical services12
- Construction10
- Administrative and support and waste management and remediation services9
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 63034?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 63033 | Florissant | 43,056 | $67k | 3.3 mi |
| 63386 | West Alton | 482 | $110k | 4.1 mi |
| 63031 | Florissant | 50,196 | $71k | 4.2 mi |
| 63138 | Saint Louis | 18,233 | $56k | 6.0 mi |
| 63301 | Saint Charles | 52,667 | $85k | 9.4 mi |
| 63135 | Saint Louis | 18,381 | $52k | 6.5 mi (near) |
| 63042 | Hazelwood | 17,813 | $50k | 6.6 mi (near) |
| 63136 | Saint Louis | 40,929 | $41k | 7.1 mi (near) |
| 63140 | Saint Louis | 316 | $46k | 7.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.