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Montana

Cost of living in Petroleum County, MT

Estimated monthly cost
$3,045/mo
for a single person, all categories combined

Population 401 · Last updated May 21, 2026

Cost breakdown

Single person, by category, per month.

Rent $1,153 38%
Healthcare $480 16%
Federal tax $445 15%
Groceries $334 11%
Transport $250 8%
State tax $163 5%
Energy $160 5%
Water $60 2%

Rent in Petroleum County

Fair Market Rents by bedroom count.

Studio
$1,100
per month
1 bedroom
$1,153
per month
2 bedroom
$1,500
per month
3 bedroom
$2,050
per month
4 bedroom
$2,393
per month

Source: HUD FMR FY2025

Income and earnings in Petroleum County

Annual earnings figures from the Census ACS.

Household income
$59,318
per year
Individual earnings
$37,250
per year
Per capita
$39,877
per year

Source: ACS 2019-2023 5-Year.

Home values in Petroleum County

Average values reported by homeowners.

Average home value
$173,700
Annual property tax
$1,261

Source: ACS 2019-2023 5-Year

Energy costs in Petroleum County

Estimated monthly electricity and gas costs.

Electricity
$103
per month · 12.9¢/kWh
Natural gas
$57
per month
Annual total
$1,920
per year

Source: EIA

Healthcare in Petroleum County

Insurance premiums and coverage rates.

Individual premium
$480
per month
Family premium
$1,350
per month
Uninsured rate
6.2%

Source: ACS + national avg. Marketplace benchmark premiums are second-lowest Silver plan estimates and do not reflect employer plans, subsidies, or out-of-pocket costs. This is not healthcare advice.

Taxes in Petroleum County

State and local tax rates for Montana.

State income tax
5.9%
Top marginal rate
State sales tax
0.0%
Combined sales tax
0.0%
incl. average local

Tax rates change. Consult a qualified tax professional for advice on your specific situation. This is not tax advice.

Transportation in Petroleum County

Commute patterns and estimated costs.

Average commute
14.2 min
Drive alone
57.1%
Public transit
0.0%
Work from home
13.4%

Source: ACS

Monthly cost estimates for Petroleum County

What it costs to live in Petroleum County each month.

Single person
$3,045
per month
  • Rent $1,153
  • Energy $160
  • Water $60
  • Groceries $334
  • Transport $250
  • Healthcare $480
  • Federal tax $445
  • State tax $163
Couple
$4,441
per month
  • Rent $1,500
  • Energy $192
  • Water $70
  • Groceries $553
  • Transport $350
  • Healthcare $864
  • Federal tax $641
  • State tax $271
Family
$7,127
per month
  • Rent $2,050
  • Energy $240
  • Water $85
  • Groceries $840
  • Transport $450
  • Healthcare $1,350
  • Childcare $1,200
  • Federal tax $641
  • State tax $271

Frequently asked questions about Petroleum County

Common questions about cost of living, rent and salary.

What is the average rent in Petroleum County?

In Petroleum County, MT, a one-bedroom apartment averages $1,153 per month, a two-bedroom averages $1,500 per month, a three-bedroom averages $2,050 per month, according to HUD Fair Market Rent data.

What is the average salary in Petroleum County?

In Petroleum County, MT, the average household income is $59,318 per year and individual earnings for full-time workers average $37,250 per year, according to U.S. Census Bureau data.

What is the cost of living in Petroleum County?

The estimated cost of living in Petroleum County, MT is approximately $3,045 per month for a single person, $4,441 for a couple, $7,127 for a family. This includes rent, utilities, groceries, transportation, healthcare, and taxes.

What is the sales tax rate in Petroleum County?

The combined sales tax rate in Petroleum County, MT is 0.00%, which includes the Montana state rate of 0.00% plus an average local rate of 0.00%.

Is Petroleum County an affordable place to live?

Based on the data, a single person in Petroleum County, MT would need approximately $3,045 per month to cover rent, utilities, food, transport, healthcare, and taxes. The average household income is $59,318 per year ($4,943 per month). Petroleum County has a moderate cost of living relative to local earnings.

How much does healthcare cost in Petroleum County?

The ACA marketplace benchmark premium in Petroleum County, MT is approximately $480 per month for an individual. Approximately 6.2% of residents are uninsured. Actual costs vary based on employer coverage, plan type, and individual circumstances.

What are house prices in Petroleum County?

The average home value in Petroleum County, MT is $173,700, with average annual property taxes of $1,261, according to U.S. Census Bureau data.

How does Petroleum County compare to other areas?

You can compare Petroleum County, MT with any other US county using our comparison tool at /compare. Petroleum County is in Montana.

Other counties in Montana

Browse the full list of counties in Montana, ranked by cost of living.

See all counties in Montana

Compare Petroleum County with another area

Put two counties side by side to see how rent, taxes and everyday costs stack up.

About this data

All figures on this page come from official U.S. government sources, listed below.

  • HUD FMR FY2025
  • ACS 2019-2023 5-Year
  • EIA
  • ACS + national avg
  • ACS
  • USDA + BEA RPP
Methodology All data sources