Contact Us

If you have questions or want to make an appointment then contact us:

Argonne Trust Company

4418 S. Technology Drive

Sioux Falls, SD  57106


Phone: 605-705-4685



Business hours:

9-5 CST



Use the form below to send us your requests and inquiries, or to make an appointment.

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South Dakota Trust Administration Office

Argonne Trust Company, Inc.

4418 S. Technology Drive

Sioux Falls, SD 57106








Or use our contact form.


Business Hours

9-5 CST

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