Order as much propane as you need. Koopman & Sons Gas Co, Inc. will deliver and install the tank for your convenience.


From heaters to grills, we offer a line of propane products and supplies. Find out what we have in stock.


We take care of the equipment we sell - call to schedule a time for your service or maintenance.

Service and Maintenance

Do you have any questions or concerns about what we have to offer? Contact us today to speak with a certified technician.

Contact Us

Your Local Source for All Things Propane

Residential and commercial propane sales and supplies around Colton & Hartford, SD

Propane is used as a fuel for many residential, commercial and industrial heat applications. If you're searching for a reliable propane supplier in Colton & Hartford, South Dakota or the surrounding area, choose Koopman & Sons Gas Co, Inc. For more than 69 years, we've offered the best in propane to our customers. We sell propane and propane products. We also offer maintenance and service on these products.

Trust a family-owned business that has been around for three generations. For all your propane needs, come to Koopman & Sons Gas Co, Inc. We're available at 605-446-3265.

Full-service solutions for any propane need

Koopman & Sons Gas Co, Inc. is an independent propane company offering a range of products and services for our customers. Propane has a wide variety of uses, so it's important to rely on a company with a staff that knows it all. We're here to answer any questions and recommend a course of action for your propane needs. We'll also:

  • Deliver your propane tank, install it and test it out
  • Service and maintain your propane equipment
  • Offer products directly from wholesalers at competitive prices

From water heaters to furnaces to grills, we have a long line of quality products available for purchase. For residential and commercial propane sales and supplies in Colton & Hartford, SD, come to Koopman & Sons Gas Co, Inc.

Work with the professionals at Koopman & Sons Gas Co, Inc. today

The employees at Koopman & Sons Gas Co, Inc. are licensed and certified to assist with a number of propane needs. We serve a 45-mile radius of Colton & Hartford, South Dakota. For quality propane services in the east of the Mount Rushmore State, call Koopman & Sons Gas Co, Inc. at 605-446-3265.

  • Koopman & Sons Gas Co, Inc.

    209 East 6th Street
    Colton, SD 57018


    Call Us
    Phone: (605) 446-3265

    Mon: 8:00AM-5:00PM
    Tue: 8:00AM-5:00PM
    Wed: 8:00AM-5:00PM
    Thu: 8:00AM-5:00PM
    Fri: 8:00AM-5:00PM
    Sat: Closed
    Sun: Closed