Counties / Illinois / Johnson County

Johnson County, IL

FIPS 17087 · population 13,376 · outside every metro area

$193k
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
$193k
▼ 3.1% year over year
Zillow ZHVI · direct
ACS median gross rent
$781
occupied-unit survey; not current asking rent
Census ACS · surveyed
Gross yield
n/a
gross yield cannot be computed without measured market rent
requires both measured price and measured rent
HUD 2-bed standard
$916
the Section 8 payment 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.

The annual signals disagree
FHFA five-year cumulative+55.5%not annualized · through 2025
0%ZILLOW ZHVI2026-06−3.1%FHFA HPI2025+3.1%
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$161k
Surveyed gross rent$781
Rent burden 30%+43.2%
Median year built1985
Housing composition

Who occupies the stock—and what it is

ACS 2024 5-year
26.0%vacant
5,541estimated housing units
Occupied tenure18.0% renter
owner 82.0%renter 18.0%
Structure mix66.6% single-family
Single-family 66.6%20+ units 1.0%Mobile home 26.6%Other 5.8%
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 jobs2,715▲ 11.3% from the prior annual release
Covered establishments194annual average reporting locations
Average weekly wage$1,176▲ 4.1% from the prior annual release
Largest private supersectorEducation and health services24.8% of disclosed private covered jobs
Local labor base

Jobs, pay and private-sector concentration

2025
0%COVERED JOBS+11.3%WEEKLY WAGE+4.1%Education and health services24.8%
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

Johnson County’s decision tension is an apparent divergence between a falling county value measure and a rising transaction index. Underwriters relying on resale comparables or near-term income should be cautious and investigate both. Zillow’s county median home value was $193,160, down 3.07% year over year. FHFA’s 2025 repeat-transaction HPI increased 3.09% annually. The index is not a home value; its method and vintage differ from Zillow’s, so the figures cannot be averaged or treated as one trend.

02Housing economics

No county market rent is published, so gross yield cannot be computed. The $916 two-bedroom HUD FMR is a payment standard, not an asking-rent estimate, and cannot substitute for market rent. The effective property-tax rate is 1.24%, with median annual tax of $1,992. Those county measures warrant carrying-cost review but cannot determine a parcel’s bill. Missing rent comparables, utilities, insurance, financing, repairs and vacancy evidence prevent a net-cash-flow conclusion.

03Demand & competition

Realtor.com’s 2026-06 MLS data, sharing Zillow’s label, show median listing price up 20.33% year over year, a 29.69% price-reduced share and a 41.67% pending-to-active ratio. This is asking-price, seller-concession and listing-status evidence—not closed-sale pricing or stand-alone proof of buyer demand—and need not reconcile with Zillow’s home-value direction. Outbound tax-return households exceeded inbound households, although incoming movers’ average AGI exceeded outgoing movers’ by a calculated $6,482. Investors accounted for 10.10% of 99 purchases, a measurable but not dominant component. QCEW covered jobs at county workplaces rose 11.32%; that is neither resident employment nor a forecast. Education and health services is the largest disclosed private supersector, not the whole economy.

04Risk & next checks

Inland flood is the dominant hazard, and modeled annual climate loss equals 0.22% of building value; it is not a property-specific dollar-loss estimate. Next checks are parcel flood zone, elevation, prior claims, insurance quotes, rent comparables and closed-sale comparables. County-level evidence cannot establish a specific property’s exposure, operating income or sale value.

Cities & communities

Where people live within Johnson 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
Vienna city1.9KGoreville village1.2KBuncombe village329Cypress village252New Burnside village162Belknap village115Simpson village40
Bars use total place population, not a county-share estimate. An asterisk marks a place that crosses a county line.
Official directory

7 Census places

Population
  1. 01
    Vienna cityIncorporated place
    1,873
  2. 02
    Goreville villageIncorporated place
    1,236
  3. 03
    Buncombe villageIncorporated place
    329
  4. 04
    Cypress villageIncorporated place
    252
  5. 05
    New Burnside villageIncorporated place
    162
  6. 06
    Belknap villageIncorporated place
    115
  7. 07
    Simpson villageIncorporated place
    40

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

0.224% of building value expected lost per year

Effective property tax1.24%

$1,992 median annual bill

02
DemandIRS SOI household flows
Net migration-26

249 in · 275 out

Arriving vs leaving income+$6,482

$57,253 arriving · $50,771 leaving

03
CompetitionHMDA financed purchases
Purchases by investors10.1%

10 of 99 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 listings48▲ 9.1% year over year
Median days on market71▼ 4.7% year over year
Listings price-reduced29.7%seller-concession signal
Median listing pricen/a▲ 20.3% year over year

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

No rent index is published for this county.Zillow’s county rent series does not cover every county, and estimating one from a neighbouring county would be a guess wearing a number’s clothes. Everything above is measured here; no wider market is mapped for it either.
Bear case

What can break the county thesis

  1. Actual market rent and operating costs may not support the carrying-cost case.
  2. Parcel flood exposure, prior losses or insurance costs may exceed the county-level modeled risk.
  3. Closed-sale comparables may not support either the Zillow value measure or MLS listing evidence.
Underwriting questions

Before pricing a property

Can gross yield be computed from the published record?

No. County market rent is not published, and HUD FMR cannot be used as market rent.

What does the FHFA measure represent?

A repeat-transaction appreciation index, not a home value.

What is the identified dominant hazard?

Inland flood.