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Compare Black Hills Communities

25 towns and unincorporated communities. Pick two to four and the full table appears underneath. Commutes are driving times to the Ellsworth main gate and downtown Rapid City. Median sold prices, where we have them, come from the MLS over the trailing twelve months with the source, window and sale count printed under each figure. Typical price bands are practical search ranges, not medians, and are labelled separately.

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Under $400k Close to Ellsworth Close to Rapid City Short commute New construction available Acreage available City water and sewer Smaller market More rural Established housing Newer housing Clear filters Clear everything

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What changes

Between Rapid Valley, St. Onge

The rows below are the ones where these do not read the same. Ordered as the table runs, not by importance.

Region: Rapid ValleyRapid City and the Ellsworth corridorSt. OngeNorthern Hills and I-90
County: Rapid ValleyPennington CountySt. OngeLawrence County
Jurisdiction: Rapid ValleyUnincorporated. There is no city government. Pennington County is the governing body, and Rapid City's subdivision rules still apply within three miles of the city limits.St. OngeUnincorporated. No town government. Lawrence County zones the parcels and the Sheriff patrols them.
Corridor: Rapid ValleySD 44 and Elk Vale RoadSt. OngeSD 34, with I-90 seven miles southeast at Whitewood
To downtown Rapid City: Rapid Valley11 min, 5.2 miSt. OngeAbout 44 miles, roughly 48 minutes
To Ellsworth AFB: Rapid Valley22 min, 10.4 miSt. OngeAbout 45 miles

Side by side

Rapid Valley, St. Onge

Rows marked as differing are the ones where these do not read alike. Rows without the mark sit on a quiet background because they say the same thing in every column.

The selected Black Hills communities compared on location, housing, utilities, schools, daily errands, mapped subdivisions and the trade each one asks for
Attribute	Rapid City and the Ellsworth corridorRapid Valley	Northern Hills and I-90St. Onge
Where it sits
Regiondiffers	Rapid City and the Ellsworth corridor	Northern Hills and I-90
Countydiffers	Pennington County	Lawrence County
JurisdictiondiffersCity versus county decides who provides service and who inspects the work.	Unincorporated. There is no city government. Pennington County is the governing body, and Rapid City's subdivision rules still apply within three miles of the city limits.	Unincorporated. No town government. Lawrence County zones the parcels and the Sheriff patrols them.
Corridordiffers	SD 44 and Elk Vale Road	SD 34, with I-90 seven miles southeast at Whitewood
To downtown Rapid Citydiffers	11 min, 5.2 miDriving time and distance, off peak.	About 44 miles, roughly 48 minutesDriving time and distance, off peak.
To Ellsworth AFBdiffers	22 min, 10.4 miDriving time and distance, off peak.	About 45 milesDistance only. Drive time is not measured for this community, so time it from the parcel.
Winter drivingdiffers	Highway 44 and Elk Vale are state and county priorities. Interior subdivision streets are county maintained and clear after the arterials do.	Highway 34 is state maintained and connects three directions. County and private roads off it are a different conversation.
Housing and lots
Typical pricediffers	About $350,000 average sold, 274 sales over 12 monthsAverage sold $349,971. Black Hills MLS, single family, 12 months through August 2026, as of August 2026. 274 closed sales.	No figure published. St. Onge is Mount Rushmore Area MLS territory and the current feed covers only the Black Hills MLS, so a zero here would be a gap in the data rather than a fact about the market.
Housing agediffers	Mostly late twentieth century through current, with active building on the edges.	An 1891 townsite with genuinely old buildings, surrounded by ranch and acreage property of every era.
New constructiondiffers	Active, with subdivisions still building	Limited, mostly infill and small projects
Acreagediffers	Some acreage, mostly platted town lots	Acreage parcels are common here
Typical lotdiffers	Suburban lots through the core, larger parcels toward Reservoir and Radar Hill Roads.	Small townsite lots, with acreage and ranch ground around them.
Covenants and HOAdiffersCovenants are recorded per plat. The title commitment lists what binds the parcel.	Recorded covenants on some plats, none on others	Few plats here carry recorded covenants
Utilities and rules
Utility patterndiffers	Utility service varies by address. Rapid Valley Sanitary District serves portions of the area, while properties outside district service may use private wells and septic systems.	Mostly private well and septic
Waterdiffers	Rapid Valley Sanitary District, treating Rapid Creek water at its own plant, with the ability to buy treated water from Rapid City at peak demand. Parcels outside the district are on private wells.	The Saint Onge Sewer and Water Company serves about 78 connections around the townsite, with a clean compliance record. Parcels outside that system are on private wells. There is no rural water district covering this area.
Sewerdiffers	Rapid Valley Sanitary District owns and maintains the collection system, and Rapid City treats the wastewater under an intergovernmental agreement. Parcels outside the district are on private septic.	The water company's name implies sewer service, but I have not been able to verify from the public record which parcels it reaches. Assume private septic outside the townsite and confirm the rest before closing.
Fire protectiondiffersThe responding department and the distance to it both affect an insurance quote.	Rapid Valley Volunteer Fire Department, which also provides EMS and wildland response.	Not recorded townwide in this guide. Confirm the responding department by address.
Short term rentalsdiffers	Unincorporated Pennington County has no city short-term rental ordinance to comply with, which is not the same as no rules. County zoning and any subdivision covenants still govern, and state licensing applies.	Unincorporated Lawrence County, so no municipal ordinance applies. Note that unincorporated Lawrence County declined to require a vacation home rental permit, so there is no county permit to obtain either.
Schools
School districtdiffers	Mostly Rapid City Area School District 51-4, with portions in Douglas 51-1Assignment follows the official boundary for the address. Confirm with the district.	Spearfish 40-2 at the townsite, with Belle Fourche 09-1 to the north and Meade 46-1 to the east. Parcel specific.Assignment follows the official boundary for the address. Confirm with the district.
Daily errands
Groceriesdiffers	Retail and everyday shopping run along Highway 44 on the southern edge, with additional grocery options a few minutes west in Rapid City.	Nothing in town. Spearfish is eleven miles southeast and Belle Fourche thirteen northwest.
Healthcarediffers	Monument Health Rapid Valley Clinic provides primary and urgent care in the community. Hospital-level care is in Rapid City.	Monument Health Spearfish Hospital, a 35 bed facility with a 24 hour emergency department, about 18 minutes away.
Recreationdiffers	Rapid Creek, the county parks east of town, and everything the Hills offer half an hour west.	Creek bottoms, hay ground and hunting country, with Spearfish Canyon and the northern Hills half an hour away.
The trade
Housing and patterndiffers	The region's largest unincorporated community: suburban streets, high ownership, county government.	An 1891 French-Canadian railroad townsite that is now a cattle auction crossroads and an acreage corridor.
What you gaindiffers	Rapid City schools and a five mile commute without Rapid City property taxes, plus a walk-in clinic in the neighborhood.	The cheapest ground in the northern Hills that still puts you eleven miles from a hospital and sixteen from three towns.
What you give updiffers	No city services, a sanitary district bill instead of a city utility bill, and an annexation line that only the parcel record can settle.	A three-way school district split you have to verify per parcel, and no services of any kind in town.

Rapid City and the Ellsworth corridorRapid Valley
Northern Hills and I-90St. Onge

Where it sits

Regiondiffers

Rapid Valley: Rapid City and the Ellsworth corridor
St. Onge: Northern Hills and I-90

Countydiffers

Rapid Valley: Pennington County
St. Onge: Lawrence County

Jurisdictiondiffers

City versus county decides who provides service and who inspects the work.

Rapid Valley: Unincorporated. There is no city government. Pennington County is the governing body, and Rapid City's subdivision rules still apply within three miles of the city limits.
St. Onge: Unincorporated. No town government. Lawrence County zones the parcels and the Sheriff patrols them.

Corridordiffers

Rapid Valley: SD 44 and Elk Vale Road
St. Onge: SD 34, with I-90 seven miles southeast at Whitewood

To downtown Rapid Citydiffers

Rapid Valley: 11 min, 5.2 miDriving time and distance, off peak.
St. Onge: About 44 miles, roughly 48 minutesDriving time and distance, off peak.

To Ellsworth AFBdiffers

Rapid Valley: 22 min, 10.4 miDriving time and distance, off peak.
St. Onge: About 45 milesDistance only. Drive time is not measured for this community, so time it from the parcel.

Winter drivingdiffers

Rapid Valley: Highway 44 and Elk Vale are state and county priorities. Interior subdivision streets are county maintained and clear after the arterials do.
St. Onge: Highway 34 is state maintained and connects three directions. County and private roads off it are a different conversation.

Housing and lots

Typical pricediffers

Rapid Valley: About $350,000 average sold, 274 sales over 12 monthsAverage sold $349,971. Black Hills MLS, single family, 12 months through August 2026, as of August 2026. 274 closed sales.
St. Onge: No figure published. St. Onge is Mount Rushmore Area MLS territory and the current feed covers only the Black Hills MLS, so a zero here would be a gap in the data rather than a fact about the market.

Housing agediffers

Rapid Valley: Mostly late twentieth century through current, with active building on the edges.
St. Onge: An 1891 townsite with genuinely old buildings, surrounded by ranch and acreage property of every era.

New constructiondiffers

Rapid Valley: Active, with subdivisions still building
St. Onge: Limited, mostly infill and small projects

Acreagediffers

Rapid Valley: Some acreage, mostly platted town lots
St. Onge: Acreage parcels are common here

Typical lotdiffers

Rapid Valley: Suburban lots through the core, larger parcels toward Reservoir and Radar Hill Roads.
St. Onge: Small townsite lots, with acreage and ranch ground around them.

Covenants and HOAdiffers

Covenants are recorded per plat. The title commitment lists what binds the parcel.

Rapid Valley: Recorded covenants on some plats, none on others
St. Onge: Few plats here carry recorded covenants

Utilities and rules

Utility patterndiffers

Rapid Valley: Utility service varies by address. Rapid Valley Sanitary District serves portions of the area, while properties outside district service may use private wells and septic systems.
St. Onge: Mostly private well and septic

Waterdiffers

Rapid Valley: Rapid Valley Sanitary District, treating Rapid Creek water at its own plant, with the ability to buy treated water from Rapid City at peak demand. Parcels outside the district are on private wells.
St. Onge: The Saint Onge Sewer and Water Company serves about 78 connections around the townsite, with a clean compliance record. Parcels outside that system are on private wells. There is no rural water district covering this area.

Sewerdiffers

Rapid Valley: Rapid Valley Sanitary District owns and maintains the collection system, and Rapid City treats the wastewater under an intergovernmental agreement. Parcels outside the district are on private septic.
St. Onge: The water company's name implies sewer service, but I have not been able to verify from the public record which parcels it reaches. Assume private septic outside the townsite and confirm the rest before closing.

Fire protectiondiffers

The responding department and the distance to it both affect an insurance quote.

Rapid Valley: Rapid Valley Volunteer Fire Department, which also provides EMS and wildland response.
St. Onge: Not recorded townwide in this guide. Confirm the responding department by address.

Short term rentalsdiffers

Rapid Valley: Unincorporated Pennington County has no city short-term rental ordinance to comply with, which is not the same as no rules. County zoning and any subdivision covenants still govern, and state licensing applies.
St. Onge: Unincorporated Lawrence County, so no municipal ordinance applies. Note that unincorporated Lawrence County declined to require a vacation home rental permit, so there is no county permit to obtain either.

Schools

School districtdiffers

Rapid Valley: Mostly Rapid City Area School District 51-4, with portions in Douglas 51-1Assignment follows the official boundary for the address. Confirm with the district.
St. Onge: Spearfish 40-2 at the townsite, with Belle Fourche 09-1 to the north and Meade 46-1 to the east. Parcel specific.Assignment follows the official boundary for the address. Confirm with the district.

Daily errands

Groceriesdiffers

Rapid Valley: Retail and everyday shopping run along Highway 44 on the southern edge, with additional grocery options a few minutes west in Rapid City.
St. Onge: Nothing in town. Spearfish is eleven miles southeast and Belle Fourche thirteen northwest.

Healthcarediffers

Rapid Valley: Monument Health Rapid Valley Clinic provides primary and urgent care in the community. Hospital-level care is in Rapid City.
St. Onge: Monument Health Spearfish Hospital, a 35 bed facility with a 24 hour emergency department, about 18 minutes away.

Recreationdiffers

Rapid Valley: Rapid Creek, the county parks east of town, and everything the Hills offer half an hour west.
St. Onge: Creek bottoms, hay ground and hunting country, with Spearfish Canyon and the northern Hills half an hour away.

The trade

Housing and patterndiffers

Rapid Valley: The region's largest unincorporated community: suburban streets, high ownership, county government.
St. Onge: An 1891 French-Canadian railroad townsite that is now a cattle auction crossroads and an acreage corridor.

What you gaindiffers

Rapid Valley: Rapid City schools and a five mile commute without Rapid City property taxes, plus a walk-in clinic in the neighborhood.
St. Onge: The cheapest ground in the northern Hills that still puts you eleven miles from a hospital and sixteen from three towns.

What you give updiffers

Rapid Valley: No city services, a sanitary district bill instead of a city utility bill, and an annexation line that only the parcel record can settle.
St. Onge: A three-way school district split you have to verify per parcel, and no services of any kind in town.

Where this comes from

Commute figures are driving times off peak, from the community guide each card links to. Median sold prices come from the MLS, and each figure carries its own source, window and closing count, because Sturgis, Spearfish and the northern hills report through a different MLS than Rapid City. Under five closings there is no median, and the price row says so. Five to nine closings carries a small sample note. School districts follow the official boundary for the address, and the district office is the only place to confirm an assignment. Short term rental lines are summaries. Read the guide and the current ordinance before you count on rental income.

The filters use these definitions: under $400k is the MLS sold figure for the town, a median where one is published and otherwise the average sold, comes in under $400,000; close to ellsworth is 25 minutes or less to the Ellsworth main gate; close to rapid city is 20 minutes or less to downtown Rapid City; short commute is 15 minutes or less to either downtown Rapid City or the Ellsworth gate; new construction available is the guide establishes active or limited new construction; acreage available is acreage is common or present in the guide; city water and sewer is city water and sewer across the community; smaller market is fewer than 100 closed single family sales in the trailing twelve months; more rural is acreage is common, or water and sewer are not municipal throughout; established housing is the guide classifies the housing stock as established, meaning largely pre 2000; newer housing is the guide classifies a meaningful share of the housing stock as 2000s or later.

Every row here is a townwide summary and a single parcel can read differently. Buyer due diligence should include verifying water and sewer service, school assignment, recorded covenants and HOA obligations, rental rules, legal access, insurance availability and which jurisdiction inspects and permits the work, for the exact address. Confirm with the city or county, the utility or district, the school district office, the title company and your insurer as applicable.

Last updated August 2026

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