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State markets/Missouri/St. Louis County/ZIP area 63021

ZIP AREA · ZCTA 63021 · CENSUS 2020

ZIP area 63021

The 14 census tracts that make up ZIP Code Tabulation Area 63021 in St. Louis County. Each tract opens its own lender ranking and its full HMDA record list.

Census tracts

14

11 counted under this ZIP

Counties

1

wholly inside one county

Population

56,906

of the tracts this ZIP owns

Owner-occupied units

18,024

19,755 1-4 family homes

Census tracts in ZIP area 63021

Every tract this ZIP area touches — sort, filter by population or overlap, export, or open a row for the tract's card. The RECORDS column opens that tract's HMDA records in the loan explorer, which is where a ZIP-scoped question becomes an exact one.

14 OF 14 TRACTSEVERY TRACT THIS ZIP AREA TOUCHES — NO ROWS WITHHELD
RECORDS
St. Louis County63021Most of this tract's land is inside 63021, so its population and housing count toward 63021.99.7%4,833UpperOPEN →
St. Louis County63021Most of this tract's land is inside 63021, so its population and housing count toward 63021.96.4%7,103UpperOPEN →
St. Louis County63021Most of this tract's land is inside 63021, so its population and housing count toward 63021.98.2%6,366UpperOPEN →
St. Louis County63021Most of this tract's land is inside 63021, so its population and housing count toward 63021.100.0%5,144UpperOPEN →
St. Louis County63021Most of this tract's land is inside 63021, so its population and housing count toward 63021.97.7%6,016MiddleOPEN →
St. Louis County63021Most of this tract's land is inside 63021, so its population and housing count toward 63021.85.9%5,402UpperOPEN →
St. Louis County63021Most of this tract's land is inside 63021, so its population and housing count toward 63021.86.0%3,505UpperOPEN →
St. Louis County63021Most of this tract's land is inside 63021, so its population and housing count toward 63021.100.0%5,818UpperOPEN →
St. Louis County63131This tract overlaps 63021 but sits mostly inside 63131, so it is counted there and not here.9.7%4,955UpperOPEN →
St. Louis County63021Most of this tract's land is inside 63021, so its population and housing count toward 63021.74.5%5,814UpperOPEN →
St. Louis County63021Most of this tract's land is inside 63021, so its population and housing count toward 63021.92.2%2,914MiddleOPEN →
St. Louis County63021Most of this tract's land is inside 63021, so its population and housing count toward 63021.95.8%3,991MiddleOPEN →
St. Louis County63088This tract overlaps 63021 but sits mostly inside 63088, so it is counted there and not here.0.4%3,122MiddleOPEN →
St. Louis County63040This tract overlaps 63021 but sits mostly inside 63040, so it is counted there and not here.22.2%5,003UpperOPEN →

What a ZIP area is, and what it is not

A ZCTA — ZIP Code Tabulation Area — is the U.S. Census Bureau's area approximation of a USPS ZIP code, not the ZIP code itself. HMDA reports no postal geography at all, so these rows are census tracts grouped by the Census 2020 tract-to-ZCTA relationship file: each tract is counted once, in the single ZCTA covering the most of its land.

We publish no ZIP-level lending figure on this page, and the omission is deliberate. Summing tract originations into a ZIP would be an approximation dressed as a measurement: the boundary is areal, a tract that straddles two ZIPs has to be given to one of them, and HMDA never said the loan was in a ZIP in the first place. The lending figures live one level down, on each tract’s own page, where they are exactly what the lender reported.

Also checked and not used: FHA endorsement records carry a property ZIP, but they cover one loan programme rather than the market, and matching them to a county by name collides in Virginia, where “Richmond” is both a county and an independent city. We do not publish a figure we cannot attribute with certainty.

Go deeper

Step back up to the St. Louis County market profile, which lists every ZIP area in the county, or the Missouri state profile.

Sources: U.S. Census Bureau 2020 ZCTA-to-census-tract relationship file (zcta_tract_rel, 168,212 overlaps across 33,791 ZCTAs and 85,143 tracts, loaded 2026-08-02); FFIEC census-tract file; HMDA tract attributes. Housing figures are summed over the tracts this ZIP area is dominant for, so they match the county page’s row for the same ZIP exactly. Figures are as loaded — see data attribution.