Affordability vs median income
Modeled annual costs equal about 45.6% of median family income in Nassau County, NY and 44.5% in St. Louis County, MO. This matters because a cheaper county can still feel tight if typical local incomes are also lower.
Nassau County, NY vs St. Louis County, MO: Cost of Living Difference
St. Louis County, MO is cheaper than Nassau County, NY for modeled annual cost of living. This comparison shows the yearly cost gap, salary needed to keep similar purchasing power, and the categories driving the difference.
Is it cheaper?
St. Louis County, MO is cheaper than Nassau County, NY.
Cheaper place
St. Louis County, MOSave about $27,319 per year.Cost gap
Moving to St. Louis County, MO is estimated to save $27,319 per year.
AnnualSave about $27,319 per year.
MonthlySave about $2,277 per month.
Salary needed
$50,000 in Nassau County, NY is about $31,930 in St. Louis County, MO.
Biggest drivers
No measured category is higher in St. Louis County, MO. Housing saves $9,874 per year.
Nassau County, NY→St. Louis County, MO
Equivalent salary in St. Louis County, MO
$31,930
-36.14% lower
Current salary: $50,000
Household: 1 adult · 0 children
Median Income in Nassau County, NY: $165,692
Median Income in St. Louis County, MO: $108,392
annual living index in Nassau County, NY 45.62%
annual living index in St. Louis County, MO 44.53%
This estimate matches your purchasing power (equivalent salary) when moving from Nassau County, NY to St. Louis County, MO.
* Living index is estimated as (estimated annual total cost / area median annual income) * 100. A living index above 100% means modeled costs exceed median income.
Cost of Living Breakdown by Category
Category-by-category comparison
Annual costs are shown for the selected household. The difference column shows how much more or less the category costs in St. Louis County, MO compared with Nassau County, NY.
| Category | Nassau County, NY | St. Louis County, MO | Annual difference | Monthly impact | Direction |
|---|---|---|---|---|---|
| Housing | $22,202 | $12,328 | -$9,874(-44.47%) | -$823 | Lower in St. Louis County, MO |
| Taxes | $18,672 | $9,210 | -$9,462(-50.67%) | -$789 | Lower in St. Louis County, MO |
| Other Costs | $8,373 | $5,296 | -$3,077(-36.75%) | -$256 | Lower in St. Louis County, MO |
| Healthcare | $8,055 | $4,996 | -$3,059(-37.98%) | -$255 | Lower in St. Louis County, MO |
| Transport | $13,523 | $11,710 | -$1,813(-13.41%) | -$151 | Lower in St. Louis County, MO |
| Food | $4,766 | $4,731 | -$35(-0.73%) | -$3 | Lower in St. Louis County, MO |
| Childcare | $0 | $0 | $0(0%) | $0 | About even |
Why this comparison matters
These notes use the actual annual cost differences between Nassau County, NY and St. Louis County, MO, so the page highlights the budget tradeoffs behind the total.
Housing
Housing is $9,874 per year lower in St. Louis County, MO than in Nassau County, NY. Housing usually behaves like a fixed monthly commitment, so this matters most for renters or buyers checking whether St. Louis County, MO changes their baseline budget.
Food
Food is $35 per year lower in St. Louis County, MO than in Nassau County, NY. Food costs affect weekly cash flow, so even a smaller modeled gap in St. Louis County, MO can show up quickly for households that cook most meals at home.
Transportation
Transportation is $1,813 per year lower in St. Louis County, MO than in Nassau County, NY. Transportation matters for commuters because driving distance, vehicle costs, and transit access can change how much of a salary is left after getting around St. Louis County, MO.
Healthcare
Healthcare is $3,059 per year lower in St. Louis County, MO than in Nassau County, NY. Healthcare differences are useful for planning premiums and out-of-pocket exposure, especially if St. Louis County, MO changes provider networks or plan options.
Other necessities
Other necessities is $3,077 per year lower in St. Louis County, MO than in Nassau County, NY. Other necessities cover everyday basics, so changes in St. Louis County, MO help explain the non-housing costs that can quietly add up month after month.
Childcare
Childcare is about the same in Nassau County, NY and St. Louis County, MO, so this category is not a major driver of the modeled gap. Childcare is most important for households with children; in St. Louis County, MO, this line can swing the result even when housing or taxes look manageable.
Taxes
Taxes is $9,462 per year lower in St. Louis County, MO than in Nassau County, NY. Taxes affect take-home pay, so the gap in St. Louis County, MO matters even if the headline salary looks similar before deductions.
Methodology and data vintage
WatchPennies uses county-level 2026 cost estimates from a 2025-2026 cost-data snapshot. The comparison includes housing, food, transportation, healthcare, childcare, other necessities, taxes, total cost, and median family income context when available.
Read the full methodologyFrequently asked questions
Which is cheaper, Nassau County, NY or St. Louis County, MO?
St. Louis County, MO is cheaper than Nassau County, NY by about $27,319 per year.
How much salary is needed in St. Louis County, MO?
A $50,000 salary in Nassau County, NY is modeled as roughly equivalent to $31,930 in St. Louis County, MO for the selected household profile.
What costs are included in this Nassau County, NY vs St. Louis County, MO comparison?
The comparison includes housing, food, transportation, healthcare, childcare, other necessities, taxes, total cost, and median family income context when available.
Is this comparison personalized financial advice?
No. WatchPennies comparisons are directional planning estimates based on county-level public datasets, not personalized financial, tax, housing, or relocation advice.
Use our map to visually compare multiple counties at once.
