ZIP Code · MO

ZIP 63021

Part of Ballwin, MO

Pop. 55,666·Saint Louis County·33rd most expensive ZIP in Missouri

Median rent (all units)

$1,613/mo

Year-over-Year

+4.3%

Month-over-Month

+0.3%

vs US Median

-$319

Reported rents

Stable (Monthly)

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Most AffordableMost Expensive

ZIP 63021 · $1,613

More affordable than 64% of US ZIP codes · National median $1,932/mo

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Compare your rent to the local median.

Medians by bedroom

Rent by unit size

Studio

$1,130

1 BR

$1,180

2 BR

$1,440

3 BR

$1,850

4 BR+

$2,140

Research median

$1,440/mo

Bedroom estimates are gross rents that include essential utilities (electricity, water, gas, sewer, trash).

Rent trends

12-month history

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Last updated: October 17, 2026

From the history

What the numbers show

Compared with the peak

Rent in ZIP 63021 is at its highest level since Zillow's records here began in February 2022.

Past year vs. the rest of Missouri

Rent in ZIP 63021 changed +4.3% over the year to September 2026. Across the 119 Missouri ZIP codes Zillow tracks, the typical change was +4.6%.

Recent direction

Rent has risen 6 months in a row, and rose in 9 of the last 12 months.

What a typical income covers

30% of the median household income ($120,177) is $3,004 a month. That covers HUD's Fair Market Rent for up to a 4-bedroom ($2,140).

Cheaper nearby

ZIP 63146, 10 miles away, rents for 15% less ($1,370/mo), about $2,900 a year in savings.

From Zillow's monthly rent index (ZORI) for ZIP 63021. Income is the Census median household income (5-year estimates). Fair Market Rents are HUD’s, which include utilities.

Annual cost

$19,356/yr

At $1,613/mo median

Location

CityBallwin

StateMO

CountySaint Louis County

Rent Market Meter

Landlord's Market

Renter's MarketBalancedLandlord's Market

Rents are climbing (4.3% YoY), so leverage tilts toward landlords. Act sooner rather than later.

Based on rent-price momentum (+4.3% YoY, +0.3% MoM), not inventory.

Demographics

Who lives here

ZIP 63021 (Ballwin, MO) is majority owner-occupied, has a median income above the national average, 63% of residents hold a bachelor's degree or higher.

Population

55,666

Median income

$120,177

Median age

40.7

Renters

19.3%

Age distribution

22.2%

19.4%

27.3%

13.1%

18%

Under 1822.2%

18–3419.4%

35–5427.3%

55–6413.1%

65+18%

Gender

48.9%

51.1%

Male48.9%

Female51.1%

Race & ethnicity

76.3%

White76.3%

Black2.6%

Hispanic5.6%

Asian10.3%

Other5.2%

Education (25+)

13.3%

21.4%

63%

No HS diploma2.3%

HS diploma13.3%

Some college21.4%

Bachelor's+63%

Housing tenure

80.7%

19.3%

Owner80.7%

Renter19.3%

Source: U.S. Census Bureau · ACS 2024 5-Year Estimates

2022 vs 2026

How ZIP 63021 in Ballwin, MO has changed in 5 years

Rent

$1,327 → $1,613

up 21.6%

Income

$98,804 → $120,177

up 21.6%

Population

56,646 → 55,666

down 1.7%

Renter share

19.6% → 19.3%

-0.3 pts

Bachelor's+

59.3% → 63%

+3.7 pts

Across the past five years, the going rent in ZIP 63021 in Ballwin, MO has shifted from $1,327 to $1,613, up 21.6% since 2022. Median household income climbed from $98,804 to $120,177 between 2021 and 2024, a 21.6% shift. Census counts show ZIP 63021 in Ballwin, MO losing about 980 residents over the five-year window, down 1.7% on net. Bachelor's-degree-or-higher attainment moved from 59.3% to 63% across the same window. Taken together, the five-year picture in ZIP 63021 in Ballwin, MO reflects how housing costs and the people paying them have evolved through a stretch that included a pandemic, a hot rental market, and a recent cooling phase.

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Local insights

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About renting in ZIP 63021

Last updated: October 17, 2026

ZIP code 63021 covers Ballwin, MO. The median rent here is $1,613/mo as of October 2026. A 1-bedroom rents for a median of $1,180/mo. A 2-bedroom rents for a median of $1,440/mo.

At 16% of local median household income ($120,177/yr), ZIP 63021 ranks as affordable compared to the national benchmark of 30%. Rents have increased 4.3% over the past year.

FAQ

Frequently asked questions

How much income do you need to rent in ZIP 63021?

To keep rent at or below 30% of gross income, you would need to earn at least $65,000/year (about $31/hour full-time) to afford the median rent of $1,613/mo in ZIP 63021. The local median household income is $120,177/yr, so the typical household meets that bar.

Is rent going up or down in ZIP 63021?

Rent in ZIP 63021 has risen 4.3% over the past year as of September 2026. That is the highest level since Zillow's records here began in February 2022.

How does ZIP 63021 compare to other ZIPs in Missouri?

ZIP 63021 is one of the pricier among Missouri ZIP codes for rent, ranking #33 of 137 at $1,613/mo. Over the year to September 2026, rent in ZIP 63021 changed +4.3%, against a typical +4.6% across the 119 Missouri ZIP codes Zillow tracks.