Cost of Living in Keystone

Keystone's cost of living centers primarily on housing, which runs close to -- though this record found a real, disclosed spread around -- South Dakota's own statewide average.

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Housing runs close to the statewide average

Keystone's cited median home value ($243,600-$315,161, a real, disclosed spread) sits close to South Dakota's own ~$319,894 statewide average, rather than clearly above or below it.

South Dakota's favorable tax structure applies

No state income tax, and a 4.2% state sales tax rate combining to an approximately 5.99% statewide average combined rate, apply in Keystone as elsewhere in South Dakota.

A real, disclosed data gap on non-housing costs

This record did not independently locate Keystone-specific grocery, utility, or healthcare cost-of-living figures distinct from broader South Dakota or Black Hills regional averages this pass.

Key takeaways

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Last reviewed: 2026-08-28. Independent research; not financial, tax, or legal advice -- confirm current figures with a local professional before making a decision.