Mortgage Debt by County: Where Homeowners Are Most Leveraged

Mortgage balances totaled $13.1 trillion as of Q2 2026, down $74 billion from the prior quarter, yet millions of American homeowners are still carrying debt loads that would have seemed extreme a decade ago. The distribution is not random. County matters more than almost any other variable.

The Counties Carrying the Most Debt

The highest-balance counties cluster predictably in coastal California, the New York metro area, and select Mountain West markets where home prices ran up sharply between 2020 and 2024.

San Mateo County, CA, has a median outstanding mortgage balance above $730,000 as of late 2025 data, the most recent county-level figures available. Santa Clara County sits just below that at roughly $710,000. Marin County, Nassau County (NY), and Loudoun County (VA) all appear in the top tier nationally.

These are not distressed markets. These are high-income households carrying large nominal balances because purchase prices forced it. The risk is not default risk in normal times. The risk is illiquidity. A homeowner with a $700,000 balance and a home worth $850,000 has $150,000 in equity on paper but almost no room to absorb a price correction.

Where Homeowners Actually Own Their Homes

At the other end sit counties in the rural Midwest, Appalachia, and parts of the Deep South where median home values are low and long-tenured owners have paid down most of their debt.

Counties in West Virginia, Mississippi, and rural Ohio routinely show median outstanding balances under $80,000. In some counties, over 40% of owner-occupied homes are owned free and clear with no mortgage at all.

This matters for retirement planning specifically. The question "do most retirees have their home paid off?" gets a complicated answer nationally, but at the county level the pattern is cleaner. In lower-cost rural counties, paid-off homeownership among those 65 and older runs above 70%. In high-cost coastal counties, that figure drops well below 50%, because buyers entered at high prices late in their working years and carried large 30-year notes into their sixties.

If you are planning retirement around housing equity, the county you bought in is not a minor detail. It is the core variable. Our guide to best states for retirees to avoid taxes covers how state tax treatment of retirement income compounds this equation.

Loan-to-Value Ratios Tell the Real Story

Raw balance figures are only half the picture. A $500,000 balance on a $600,000 home is far more dangerous than a $500,000 balance on a $1.2 million home.

High loan-to-value concentrations, meaning homeowners who owe 80% or more of their home's current value, show up most heavily in markets where appreciation stalled after 2023. Parts of Austin (Travis County, TX), Boise (Ada County, ID), and Phoenix (Maricopa County, AZ) saw price pullbacks of 10 to 18% from peak, leaving buyers from 2021 and 2022 with thin or negative equity cushions even three or four years later.

California's high-balance counties actually fare better on LTV than their nominal balances suggest, because prices in San Mateo and Santa Clara recovered and moved higher through 2025 and 2026. The problem there is payment burden relative to income, not equity.

For households in high-debt, high-cost states, the property tax overlay adds another layer. New Jersey's effective property tax rate runs at 2.13%, meaning a $600,000 home generates roughly $12,800 in annual property tax alone, on top of a mortgage payment already stretched by a 6.5% to 7% rate environment.

What the Rate Environment Did to Borrowers

Anyone asking whether mortgage rates will ever return to 3% is asking the wrong question for planning purposes. Rates in 2026 remain in the 6.5% to 7.25% range for a 30-year fixed, depending on credit profile and loan size.

That rate level means a $400,000 mortgage at 6.75% requires roughly $2,595 per month in principal and interest alone. To keep that payment within standard 28% front-end ratio guidelines, a borrower needs a gross income around $111,000. Many counties where median home prices demand a $400,000 mortgage have median household incomes well below that threshold.

The gap between what buyers need to earn and what they actually earn is one of the cleaner ways to identify structurally overextended markets. Use our cost comparison calculator to model how mortgage payments, property taxes, and state income taxes stack up against income in specific counties.

For households thinking about where to retire or relocate, housing debt exposure intersects directly with state tax burden. See how the true cost of living in high-tax states changes the math on carrying a large mortgage into retirement.

Key Takeaways

• Mortgage balances totaled $13.1 trillion nationally as of Q2 2026, with the heaviest county-level concentrations in coastal California and the New York metro, where median balances exceed $700,000.
• In high-cost markets like Travis County (TX) and Ada County (ID), price corrections of 10 to 18% from 2021 to 2022 peaks left many recent buyers with LTV ratios above 80% heading into 2026.
• A $400,000 mortgage at current 2026 rates requires approximately $111,000 in gross household income to meet standard underwriting guidelines, a threshold that exceeds median household income in most of the counties where that mortgage size is typical.

Compare how mortgage burden, property taxes, and state income taxes combine in any state you are considering at liveordiehere.com.