Looking for a geothermal installer in Madison, SD? Describe your project once and up to three geothermal installers who work in Madison and Lake County get back to you with a quote. It's free and there is no obligation.
Madison is home to about 6,086 people (2024 Census Bureau estimate), a shrinking community (−1.7% since 2020). With 1,318 people per sq mi, it is a suburban area. Homes with yards and long heating seasons are good candidates for geothermal systems here.
Madison at a glance
- Population (Census Bureau estimate, 2024)
- 6,086 (−1.7% since 2020)
- Rank in South Dakota
- 17th of 310 cities and towns
- Land area
- 4.6 sq mi
- Population density
- 1,318 people per sq mi (suburban)
- Type
- City (Madison city)
- Main county
- Lake County
What to check before hiring in Madison
- Permits: in South Dakota, vertical loops may need a well or drilling permit in addition to the mechanical permit.
- Design: ask for a load calculation and loop design.
- Incentives: check current utility and state programs.
- Price drivers: loop type and length, drilling conditions and the unit.
Useful official resources
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U.S. Department of Energy: geothermal heat pumps
Official information and guidance.
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ENERGY STAR
Official information and guidance.
Services available in Madison
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Geothermal heat pump system
Design and installation of a ground-source heat pump with vertical or horizontal loops.
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Geothermal repair or replacement
Repair or replacement of the heat pump unit on an existing loop.
Frequently asked questions in Madison
How much does geothermal cost in Madison, SD?
It depends on the loop, the drilling and the unit. Describe your home: installers who serve Madison reply with a quote.
How long does installation take?
Often one to two weeks, including loops.
Will my yard be torn up?
Temporarily; ask about restoration.
Which geothermal installers will contact me?
Up to three independent geothermal installers who serve Madison and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.