South Dakota cities compared
Both South Dakota metropolitan areas on the same $100,000 salary and the same $400,000 home, with the income tax identical in each — so the whole difference is property tax and the price level.
Rapid City and Sioux Falls, resolved side by side
South Dakota has 2 metropolitan areas with a published price index, and on $100,000 with a $400,000 home they are not interchangeable: $83,943 of purchasing power in Rapid City against $82,325 in Sioux Falls — $1,618 a year, 1.6% of the salary, without leaving the state.
That gap is unusually easy to trust, because the income tax is identical in every row. Federal $13,170, FICA $7,650, South Dakota state income tax $0 — the state does not levy one, and no county or city in South Dakota levies its own. Two things move down this table and only two: what a house costs in property tax, and what everything costs at the till.
| Metropolitan area | Buys | Behind the best | Prices | Property tax |
|---|---|---|---|---|
| 1Rapid City | $83,943 | best | 89.16 | 1.08% |
| 2Sioux Falls | $82,325 | −$1,618 | 90.631 | 1.14% |
Purchasing power on a $100,000 salary with a $400,000 home: take-home after federal, FICA, South Dakota income tax and property tax, divided by that area’s price level. The income tax is identical in every row — the whole of the spread is property tax and the price level. Price index 100 is the US average.
Every one of these areas prices below the national average.
Property tax runs from 1.08% in Rapid City to 1.14% in Sioux Falls — on a $400,000 home that is $4,336 against $4,568 a year, a difference of $231. Each rate is that area's counties averaged and weighted by how many homes are in each, because a house pays the tax and a rural county of a few thousand homes should not weigh the same as an urban one of several hundred thousand.
The 1 South Dakota comparisons, resolved
Every pair of South Dakota cities, each on its own page with the full working, the break-even salary and the property tax bill house by house. Ordered by the population that could plausibly be choosing between them:
Rapid City vs Sioux Falls — Rapid City by $1,618 a year. Price level 89.16 against 90.631; property tax 1.08% against 1.14%.
Every South Dakota city, and what it can be compared with
The areas themselves, largest first. Each line has what defines that city on the two measures that matter here, and then every comparison it takes part in:
Sioux Falls — 293k people across 5 counties. Price level 90.631, housing 77.605, property tax 1.14%. Compared with Rapid City.
Rapid City — 151k people across 3 counties. Price level 89.16, housing 72.552, property tax 1.08%. Compared with Sioux Falls.
The counties behind each rate
Nobody pays a metropolitan area's property tax rate. They pay their county's, and the figures above are those county rates averaged and weighted by how many homes each county holds. Opened up:
Sioux Falls averages 1.14% across 5 counties: Minnehaha County 1.16%, Lincoln County 1.18%, Rock County 0.72%, Turner County 1.04%, McCook County 0.98%. Inside the area the rate runs from 0.72% in Rock County to 1.18% in Lincoln County, which is $1,847 a year on a $400,000 home — more than the gap between the best and worst city in this whole state.
Rapid City averages 1.08% across 3 counties: Pennington County 1.13%, Meade County 1.03%, Custer County 0.78%. Inside the area the rate runs from 0.78% in Custer County to 1.13% in Pennington County, which is $1,394 a year on a $400,000 home — a real spread inside a single labour market.
Which is the limitation of every figure on this page, stated rather than buried: an area rate is an average, and your address decides what you actually pay. The county pages linked above carry the rate, the assessment basis and the source for each one.
Where South Dakota cities sit among the 380 in the country
A state ranking answers "where in South Dakota". It does not answer whether South Dakota is an expensive place to begin with, and the two questions have different answers often enough to be worth separating.
Against all 380 metropolitan areas the Bureau of Economic Analysis prices, Sioux Falls ranks 271 and Rapid City ranks 302, counting from the most expensive. The national median area sits at 93.492 — Monroe — so 0 of these 2 South Dakota areas are dearer than the typical American metropolitan area and 2 are cheaper.
Neither end of this state reaches the national extremes, which run from 115.613 to 83.597.
The distinction matters for a specific reason. Everything on this page holds the income tax constant because these cities share a state; the moment a move crosses a state line that stops being true, and the comparison becomes the harder one — which is what South Dakota against every other state is for.
The tax that is the same in all 2
Worth spelling out, because it is what makes the ranking above readable at all. On $100,000, in every one of these areas:
Federal income tax — $13,170. Set by Congress, identical everywhere in the United States.
Social Security and Medicare — $7,650. Also federal, and also flat across the country up to the Social Security ceiling.
South Dakota income tax — $0. The state does not tax wage income at all, so the line is genuinely zero rather than unmodelled. One set of brackets for the whole state.
Local income tax — $0. South Dakota does not permit counties, cities or school districts to levy their own. That is not a modelling shortcut, it is the law, and it is the condition on which these pages get published: in the eleven states that do permit it, the levying jurisdictions do not line up with metropolitan areas and no honest rate can be assigned.
Which leaves property tax as the only tax in the whole comparison that moves — from $4,336 to $4,568 a year on the same $400,000 home — and the price level as the only other thing. Two variables, both measured, both sourced. It is as clean as a cost-of-living comparison gets.
Rapid City stays on top whether you rent or buy
A ranking built on one salary and one house value is worth exactly as much as its assumptions, so here are the same 2 areas resolved again with those assumptions changed.
Renting, with no property tax at all: Rapid City still leads, by $1,441 over Sioux Falls. The order does not depend on owning a house.
On $60,000 instead of $100,000: Rapid City still leads. The gap narrows to $1,093 — smaller in dollars, but a larger share of a smaller salary.
On $250,000: Rapid City still leads, and by $3,511 — the spread widens with income, because the price level applies to everything you have left after tax.
This is the same discipline applied to a single published figure elsewhere on this site: a number without its range is half a number. Every page linked above lets you set your own salary, your own house and your own horizon, and recomputes the whole comparison rather than scaling it.
How this is worked out, and what it does not claim
Every row is the same calculation: gross salary in, federal income tax and FICA out, South Dakota income tax out, property tax on a $400,000 home out — then what is left divided by that area's price level, so the figure is what the money buys rather than what the payslip says.
The price index is the Bureau of Economic Analysis Regional Price Parity, 2024, published per metropolitan area with a documented method and broken into housing, goods, utilities and services. Which counties make up each area comes from the Census Bureau delineation file, joined by CBSA code and never by name — there are thirty "Washington County" in the United States and a join on names would have failed silently.
US Bureau of Economic Analysis — Regional Price Parities by State and Metro Area, 2024 (released 19 February 2026) — read 2026-09-10. https://www.bea.gov/data/prices-inflation/regional-price-parities-state-and-metro-area
US Census Bureau — Core Based Statistical Areas delineation file, 2023 (which counties form each metropolitan area) — read 2026-09-10. https://www.census.gov/geographies/reference-files/time-series/demo/metro-micro/delineation-files.html
US Census Bureau, American Community Survey — county effective property tax rates and housing units — read 2026-08-31. https://data.census.gov/
What it does not claim: that the city at the top is the better place to live. This measures what a salary buys. Schools, the commute, the weather and how far you are from your family are not in it, and on a move inside one state they are usually what actually decides it.
It also assumes one salary, one house value and a buyer rather than a renter. Every page linked above lets you change all three, and the answer moves with them — on some pairs enough to change which city comes out ahead.
Where to go next
Questions
- Which city in South Dakota leaves you best off?
- Rapid City, at $83,943 of purchasing power on $100,000 with a $400,000 home — $1,618 a year more than Sioux Falls at the other end of the table. Because the income tax is identical everywhere in South Dakota, that ranking is made of two things only: the price level and property tax.
- Which is the cheapest city in South Dakota?
- Rapid City, at 89.16 on the Bureau of Economic Analysis price index where 100 is the US average, against 90.631 in Sioux Falls. Cheapest is not the same as best off, though: property tax is set separately and can move a household by $231 a year on the same house.
- Does income tax differ between cities in South Dakota?
- No. South Dakota sets one set of brackets for the whole state — in fact it does not tax wage income at all, and it does not let counties or cities levy their own income tax. On $100,000 the bill is federal $13,170, FICA $7,650 and state $0 in every one of these 2 areas. That is what makes comparing them clean.
- How much does cost of living vary inside South Dakota?
- South Dakota has 2 metropolitan areas, 89.16 and 90.631 on the price index. The spread is narrower than in a state like California, but the state-level figure is still an average of them rather than a description of either.
- How many South Dakota city comparisons are there?
- 1, one page each, every pair of the 2 metropolitan areas the Bureau of Economic Analysis prices in South Dakota. Each resolves the same way — income tax, property tax and price level — and each shows the break-even salary in both directions.