Residential delivery area · Missouri
ZIP Code 63033: Florissant, MO
ZIP code 63033 uses the postal name Florissant, Missouri and lies entirely in St. Louis County (Census 2020 ZIP-county file). About 43,000 people live there (Census Bureau, ACS 2020-2024), the 2nd most populous of Florissant's 3 residential ZIP codes. Median household income is $66,776 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Florissant (37%) and Black Jack (21%), and 2% in smaller places; 39% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Florissant · 3 residential ZIPs
- County
- St. Louis County
- Census places
- Florissant (37%); Black Jack (21%)
- Metro area
- St. Louis, MO-IL
- House district
- MO-1 119th Congress
- State
- Missouri
- Time zone
- Central
- Land area
- 12.2 sq mi · 3,544 people per sq mi
- PO Box ZIPs
- 63032 also use the name Florissant
Where is ZIP code 63033?
63033 centers on 38.798°, -90.274° and covers 12.2 square miles of land plus 0.0 of water. It borders 5 ZIP codes: 63034, 63135, 63136, 63031, 63138.
The map draws ZIP code areas only. For the streets inside 63033, 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 63033 compare with the rest of Florissant?
| Measure | 63033 | In Florissant | In St. Louis County | In MO |
|---|---|---|---|---|
| People (ACS 2020-2024) | 43,056 | 2nd of 3 | 7th of 47 | 19th of 1,035 |
| Median household income | $67k | 3rd of 3 | 31st of 44 | 224th of 479 |
| Median home value | $174k | 2nd of 3 | 33rd of 45 | 311th of 494 |
Its median household income is higher than in 42% of U.S. residential ZIP codes, and it is denser than 90% 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 63033?
The 2020 Census counted 43,175 people in 63033; the ACS, which samples households over 2020-2024, estimates 43,056. Between the 2010 and 2020 censuses its population grew 0.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 43,056
- 2020 Census count
- 43,175+0.4% since 2010 (43,000)
- Households
- 17,660
- Median age
- 39.5
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 63033?
Of the 43,056 people the ACS estimates in 63033, 22.7% are under 18 and 19.4% are 65 or older. The largest group by race and Hispanic origin is Black (not Hispanic) (73.4%), then White (not Hispanic) (19.8%).
- Under 1822.7%
- 18 to 6457.9%
- 65 and older19.4%
- Black, not Hispanic73.4%
- White, not Hispanic19.8%
- Other or two or more4.7%
- Hispanic or Latino1.4%
- Asian, not Hispanic0.7%
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 63033 earn?
Median household income is $66,776 (ACS 2020-2024), the 31st highest of the 44 ranked ZIP codes in St. Louis County. It is not measurably different from 2015-2019 ($67,456 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $66,776
- Income per person
- $34,421
- Below the poverty line
- 8.1%
- Unemployed (of the labor force)
- 4.5%
- Adults 25+ with a bachelor's degree
- 27.6%
- Adjusted gross income per tax return, 2022
- $48,56420,530 returns; wages 78% 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 63033?
FHFA's house price index for 63033, built from repeat sales and appraisals of the same homes, rose 111% from 2015 to 2025 and rose 53% from 2020 to 2025, and moved +2.5% in 2025.
- Median home value (owners' estimate)
- $173,700
- Median gross rent
- $1,206
- Homes owned by their occupants
- 66.6%
- Housing units
- 19,176
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 63033?
633 business establishments had a location in this ZIP code in 2023, 116 fewer than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance187
- Retail trade107
- Accommodation and food services81
- Other services (except public administration)76
- Finance and insurance41
- Real estate and rental and leasing27
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 63033?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 63034 | Florissant | 18,908 | $104k | 3.3 mi |
| 63135 | Saint Louis | 18,381 | $52k | 3.5 mi |
| 63136 | Saint Louis | 40,929 | $41k | 3.8 mi |
| 63031 | Florissant | 50,196 | $71k | 4.4 mi |
| 63138 | Saint Louis | 18,233 | $56k | 4.4 mi |
| 63137 | Saint Louis | 19,684 | $43k | 4.7 mi (near) |
| 63140 | Saint Louis | 316 | $46k | 4.9 mi (near) |
| 63134 | Saint Louis | 13,059 | $45k | 5.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.