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FHA loans in Johnston, IA

Quick answer

The 2026 FHA loan limit in Johnston, IA (Polk County) is $541,287 for a single-family home, enough for a purchase price up to about $560,000 with 3.5% down. On the $346,200 median home value, that down payment is about $12,117 and the estimated payment is $2,979/month at 7.18%, which needs roughly $128,000 a year in income.

By Purchase Mortgage Loan Editorial Team Checked against official sources per our editorial standardsData last updated

Median household income: $103,430; value-to-income ratio 3.35. Johnston ranks 2 by home value and 22 by population among 42 places in our IA dataset.

What does an FHA loan cost on a typical Johnston home?

ItemJohnston
Median home value (Census ACS)$346,200
Iowa median home value$195,900
Down payment (3.5%)$12,117
Loan incl. 1.75% upfront MIP$339,929
Estimated monthly payment (PITI + MI)$2,979
Income needed (28% / 36%)$128,000 / $100,000
Polk County 2026 FHA limit (1 unit)$541,287
Max purchase price at the limit$560,000

Rate assumption: 7.18% (Freddie Mac PMMS 30-year fixed average, week of November 5, 2026). Change it in the payment calculator.

Payment includes Iowa's 1.43% effective property tax rate (Census ACS), $1,342/yr homeowners insurance (NAIC state average) and 0.55% annual FHA MIP.

What is the 2026 FHA loan limit in Johnston?

Johnston is in Polk County where HUD's 2026 one-unit FHA limit is $541,287. With the minimum 3.5% down, that caps the purchase price at about $560,000; above that you'd need a bigger down payment or a conventional loan (conforming limit $832,750).

The Johnston median home value of $346,200 is 77% above the Iowa median, and within what the county limit supports.

Which down payment assistance programs can Johnston buyers use?

FHA loans in nearby cities

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FHA loan FAQs for Johnston

Johnston is in Polk County, where HUD's 2026 FHA limit for a one-unit home is $541,287. With 3.5% down, that supports a purchase price up to about $560,000.

3.5% of $346,200 is about $12,117 with a 580+ credit score (10%, or $34,620, with a 500–579 score), plus closing costs.

At the $346,200 median value (above the Iowa median of $195,900), the estimated payment of $2,979/month at 7.18% needs about $128,000 a year under the 28% housing guideline, or $100,000 if your total debts stay under 36%.

0 city-level, 0 county-level and 2 statewide programs are verified for this city (2 total). Check each official administrator's eligibility rules and available funds.

Sources

Data last updated October 23, 2026.

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Figures on this page are estimates for educational purposes only and are not a loan offer or commitment to lend. Rates, loan limits, fees and assistance programs change frequently and vary by lender, location and borrower profile. Confirm current terms with a licensed loan officer.