Counties / Montana / Jefferson County

Jefferson County, MT

FIPS 30043 · population 12,774 · part of Helena, MT

$534k
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
$534k
▲ 4.6% year over year
Zillow ZHVI · direct
ACS median gross rent
$925
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
$1,404
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.

Both annual signals move in the same direction
FHFA five-year cumulative+73.6%not annualized · through 2025
0%ZILLOW ZHVI2026-06+4.6%FHFA HPI2025+6.4%
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$447k
Surveyed gross rent$925
Rent burden 30%+30.0%
Median year built1990
Housing composition

Who occupies the stock—and what it is

ACS 2024 5-year
7.6%vacant
5,407estimated housing units
Occupied tenure15.8% renter
owner 84.2%renter 15.8%
Structure mix85.4% single-family
Single-family 85.4%20+ units 0.0%Mobile home 11.3%Other 3.3%
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 jobs2,784▲ 2.7% from the prior annual release
Covered establishments505annual average reporting locations
Average weekly wage$1,104▲ 5.2% from the prior annual release
Largest private supersectorConstruction19.8% of disclosed private covered jobs
Local labor base

Jobs, pay and private-sector concentration

2025
0%COVERED JOBS+2.7%WEEKLY WAGE+5.2%Construction19.8%
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

Jefferson County’s tension is rising value indicators against unmeasured lease income and identifiable flood exposure. Zillow’s county median home value is $533,818 and its reported annual change is 4.61%; the separately supplied FHFA repeat-transaction HPI annual change is 6.37%. Those measures point upward but use different methods and supplied observation periods, so they should not be averaged or treated as a specific asset’s sale-price trend. This is a diligence case for buyers able to verify rent, taxes and hazard mitigation; it warrants caution for anyone underwriting from appreciation alone.

02Housing economics

Market rent is not published, so gross yield cannot be computed. HUD’s two-bedroom FMR of $1,404 per month is a payment standard, not an estimate of asking rent, and cannot substitute for a lease comp. The effective property-tax rate is 0.55%, and median annual tax is $2,446; both should be tested at parcel level alongside insurance and maintenance. Realtor.com’s MLS listing market showed falling active listings, while 10.98% of listings had price reductions. Active listings are visible supply and reductions are seller concessions, not closed-sale prices or independent proof of buyer demand.

03Demand & competition

County workplace evidence is constructive but limited: QCEW annual covered employment grew 2.69%, and the covered-worker average weekly wage was $1,104. These are jobs located at county workplaces, not resident employment or an unemployment measure; Construction is the largest disclosed private supersector, not the entire economy. Net tax-return migration was 82 households, while average income per incoming mover exceeded that of outgoing movers by $18,752. The investor share was 2.54%, or 3 of 118 purchases, indicating limited recorded non-occupant mortgage participation; it does not capture every competing buyer.

04Risk & next checks

Risk control is central: inland flood is the dominant hazard, and modeled annual climate loss equals 0.20% of building value. That modeled ratio should be paired with site-specific flood-zone, insurance-quote and deductible review; it is not a dollar loss forecast. Missing market rent prevents yield and rent-to-FMR testing, while no property-level condition, insurance, financing, sale-comparable or tenant evidence is published here. Those gaps prevent a defensible cash-flow, replacement-cost or exit-price conclusion despite the county-level indicators.

Cities & communities

Where people live within Jefferson 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
Montana City CDP3.1KClancy CDP1.9KBoulder city1.3KWhitehall town1.2KSouth Hills CDP620Jefferson City CDP533Basin CDP352Rader Creek CDP310
Bars use total place population, not a county-share estimate. An asterisk marks a place that crosses a county line.
Official directory

10 Census places

Population
  1. 01
    Montana City CDPCensus-designated place
    3,092
  2. 02
    Clancy CDPCensus-designated place
    1,874
  3. 03
    Boulder cityIncorporated place
    1,284
  4. 04
    Whitehall townIncorporated place
    1,156
  5. 05
    South Hills CDPCensus-designated place
    620
  6. 06
    Jefferson City CDPCensus-designated place
    533
  7. 07
    Basin CDPCensus-designated place
    352
  8. 08
    Rader Creek CDPCensus-designated place
    310
  9. 09
    Elkhorn CDPCensus-designated place
    34
  10. 10
    Cardwell CDPCensus-designated place
    30

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

0.196% of building value expected lost per year

Effective property tax0.55%

$2,446 median annual bill

02
DemandIRS SOI household flows
Net migration+82

496 in · 414 out

Arriving vs leaving income+$18,752

$80,815 arriving · $62,063 leaving

03
CompetitionHMDA financed purchases
Purchases by investors2.5%

3 of 118 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 listings67▼ 10.7% year over year
Median days on market57▼ 0.9% year over year
Listings price-reduced11.0%seller-concession signal
Median listing pricen/a▲ 9.2% 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; for a rent figure, the Helena, MT page covers the wider market.
Same metro

The other counties in Helena, MT

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
Jefferson County12,774$534kn/an/ainland flooding
Lewis and Clark County73,464$472k$1,6484.2%inland flooding
Broadwater County7,668$535kn/an/ainland flooding
Bear case

What can break the county thesis

  1. Verified achievable rent may not support carrying costs.
  2. Site-specific flood insurance, deductibles or mitigation requirements may exceed underwriting assumptions.
  3. County indicators may not translate to a particular property’s condition, tenant demand or resale value.
Underwriting questions

Before pricing a property

Is market rent or gross yield published for Jefferson County?

No. Market rent is not published, so gross yield cannot be computed.

What HUD two-bedroom FMR is reported?

HUD’s reported two-bedroom FMR is $1,404 per month; it is a payment standard rather than market rent.

How much recorded investor participation is shown?

Investor purchases were 3 of 118 total purchases, or a 2.54% investor share.