Counties / Missouri / Warren County

Warren County, MO

FIPS 29219 · population 37,177 · part of St. Louis, MO

$339k
Zillow home value · 2026-06
The numbers

What this county costs and earns

Everything here joins on the county FIPS code, so each figure comes from the agency that publishes it with no name matching in between.

Zillow home value
$339k
▲ 1.9% year over year
Zillow ZHVI · direct
Median asking rent
$1,225
▲ 8.7% year over year
Zillow ZORI · direct
Gross yield
4.3%
annual rent ÷ price, before costs
derived: rent × 12 ÷ price ✓
HUD 2-bed standard
$1,218
market rent is 1.01x the standard
HUD Fair Market Rent · direct
Independent price check

Do two methods point the same way?

Zillow estimates a current home value. FHFA tracks repeat mortgage transactions. Their growth rates should be read side by side, not averaged.

Both annual signals move in the same direction
FHFA five-year cumulative+61.5%not annualized · through 2025
0%ZILLOW ZHVI2026-06+1.9%FHFA HPI2025+5.6%
Annual changes use different methods and may use different periods. The comparison checks direction and magnitude; it does not create a blended estimate. Zillow county ZHVI pulled 2026-07-26; FHFA annual county HPI pulled 2026-07-28.
Owner-reported value$260k
Surveyed gross rent$995
Rent burden 30%+41.0%
Median year built1998
Housing composition

Who occupies the stock—and what it is

ACS 2024 5-year
14.3%vacant
16,161estimated housing units
Occupied tenure19.8% renter
owner 80.3%renter 19.8%
Structure mix82.1% single-family
Single-family 82.1%20+ units 0.3%Mobile home 10.0%Other 7.6%
ACS estimates describe the standing housing stock and occupied tenure. They do not measure current listings, transaction prices or asking rents.

Survey source: Census ACS 5-year — county housing value, tenure and stock · ACS 2024 5-year · pulled 2026-07-30. These values describe different housing universes and are not combined into gross yield.

Annual average covered jobs9,001▲ 9.6% from the prior annual release
Covered establishments806annual average reporting locations
Average weekly wage$1,021▲ 4.8% from the prior annual release
Largest private supersectorManufacturing26.6% of disclosed private covered jobs
Local labor base

Jobs, pay and private-sector concentration

2025
0%COVERED JOBS+9.6%WEEKLY WAGE+4.8%Manufacturing26.6%
Annual QCEW counts cover jobs located at reporting establishments. The industry share uses disclosed private covered employment; it is not a resident-employment measure or a forecast.

Workplace source: BLS QCEW — county employment and wages · annual county employment and wages 2025 vs 2024 · pulled 2026-07-31. QCEW counts covered jobs located in the county, not employed residents or the metro score’s CES/LAUS series.

County brief

What the local evidence says

01Decision frame

Warren County presents a yield-versus-liquidity tension: Zillow’s median home value is $338,800 while median asking rent is $1,225 per month and supplied gross yield is 4.34% before costs. Value rose 1.94% year over year while asking rent rose 8.71%, a spread worth testing through lease comparables and operating costs; resale-dependent underwriting deserves caution. HUD FMR is a payment standard, not a market-rent estimate, and is not used to derive yield.

02Housing economics

Carrying costs may narrow the gross spread: effective property tax is 0.70%, but parcel assessment and insurance costs are not published. Zillow’s value movement and FHFA’s repeat-transaction HPI use different methods and supplied periods. FHFA shows a 5.58% annual index change and a 61.47% cumulative five-year index change, not a dollar value; these rates should not be averaged. Realtor.com MLS evidence shows listing prices down 1.62%, 63 median days on market, and 14.01% of listings reduced. These are asking-price, marketing-time, and concession measures—not closed sales or proof of buyer demand.

03Demand & competition

Demand evidence is mixed rather than conclusive. Net migration was 236 tax-return households, while incoming movers’ average income exceeded outgoing movers’ by $187. That gap does not establish local rental absorption. Investor participation was 39 purchases among 531 total purchases, so buyer mix and investor depth need local transaction review. QCEW describes annual covered jobs at county workplaces, not resident employment or unemployment; Manufacturing is the largest disclosed private supersector, not the entire economy. Its wage is a covered-worker average, not household income.

04Risk & next checks

Risk limits are material. Inland flood is the dominant hazard, and modeled expected annual climate loss equals 0.15% of building value; it is a model, not an insurance quote or parcel outcome. The thesis can fail if property-specific flood exposure or insurance erodes gross yield, if the softer MLS posture persists into closed-sale pricing, or if migration does not translate into rental absorption. Obtain parcel flood history and insurance, lease comps and vacancy records, and closed-sale financing data; their absence prevents net-yield, exit-price, and tenant-demand conclusions.

Cities & communities

Where people live within Warren County

Census-recognized incorporated places and CDPs that intersect this county. The list does not pretend to include every neighborhood or informal community.

Population scale

Largest Census places

ACS 2024 5-year
Warrenton city9.1KWright City city5.2KMarthasville city2.3KForistell city*1.1KTruesdale city990Innsbrook village843Pendleton village23Three Creeks village3
Bars use total place population, not a county-share estimate. An asterisk marks a place that crosses a county line.
Official directory

8 Census places

Population
  1. 01
    Warrenton cityIncorporated place
    9,066
  2. 02
    Wright City cityIncorporated place
    5,240
  3. 03
    Marthasville cityIncorporated place
    2,328
  4. 04
    Foristell cityIncorporated place · spans 2 counties
    1,096
  5. 05
    Truesdale cityIncorporated place
    990
  6. 06
    Innsbrook villageIncorporated place
    843
  7. 07
    Pendleton villageIncorporated place
    23
  8. 08
    Three Creeks villageIncorporated place
    3

Population is the total place-wide ACS estimate, not an allocated county share. A place crossing a county line is labelled explicitly. Source: Census ACS 5-year — cities and communities · ACS 2024 5-year · pulled 2026-07-30.

Risk, demand and competition

The three things a price does not tell you

01
Risk & carrying costFEMA NRI + Census ACS
Dominant hazardinland flooding

0.153% of building value expected lost per year

Effective property tax0.69%

$1,809 median annual bill

02
DemandIRS SOI household flows
Net migration+236

1,324 in · 1,088 out

Arriving vs leaving income+$187

$59,394 arriving · $59,207 leaving

03
CompetitionHMDA financed purchases
Purchases by investors7.3%

39 of 531 mortgages

investorother financed
Current listing pressure

What sellers and visible supply are doing

Realtor.com® Economic Research · county inventory 2026-06 · pulled 2026-07-28
Active listings221▲ 1.4% year over year
Median days on market63▲ 56.3% year over year
Listings price-reduced14.0%seller-concession signal
Median listing pricen/a▼ 1.6% year over year

Listing price is an asking price, not a closed sale. Quality-flagged county rows are withheld instead of displayed.

Same metro

The other counties in St. Louis, MO

A metro is an average of these. Which side of a county line a property sits on can change the tax bill, the hazard profile and the tenant pool.

CountyPopulationPriceRentYieldHazard
Warren County37,177$339k$1,2254.3%inland flooding
St. Louis County995,569$293k$1,4776.0%inland flooding
St. Charles County414,535$378k$1,7005.4%inland flooding
St. Louis city288,512$187k$1,3948.9%inland flooding
Madison County264,238$202k$1,1777.0%inland flooding
St. Clair County253,694$181k$1,3218.8%inland flooding
Jefferson County229,458$298k$1,4846.0%inland flooding
Franklin County105,950$273k$1,1565.1%inland flooding
Lincoln County63,057$319k$1,7506.6%inland flooding
Bear case

What can break the county thesis

  1. Parcel-level flood exposure and insurance costs may materially exceed county-level climate modeling.
  2. MLS softness may carry into closed-sale values and reduce exit liquidity.
  3. County migration may not translate into neighborhood-level rental absorption.
Underwriting questions

Before pricing a property

What rent measure supports the stated gross yield?

Published median asking rent supports it; HUD FMR is a payment standard and cannot substitute for market rent or yield.

Is investor buying dominant in the recorded purchase activity?

No. The record shows non-owner purchases are a minority of total purchases.

What labor-market measure is available?

QCEW provides annual covered employment at county workplaces, with Manufacturing the largest disclosed private supersector; it is not resident employment or unemployment.