Post offices serve all communities within a county, from city branch locations to rural contract postal units that serve smaller towns and unincorporated areas with essential mail services. There are 6 Post Office locations in Dewey County, South Dakota.

Residents of Dewey County should be aware that rural post offices and contract postal units may have limited hours compared to full-service branches. USPS provides a free package pickup service for all residents, including those in rural areas, which can eliminate the need to travel to a post office for outgoing packages.

List of Dewey County, South Dakota Post Office

Eagle Butte Post Office

View Details Call Now (605) 964-6633

Eagle Butte Post Office

Address
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Hours

Isabel Post Office

View Details Call Now (605) 466-2165

Isabel Post Office

Address
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Hours

Lantry Post Office

View Details Call Now (605) 964-8018

Lantry Post Office

Address
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Hours

Ridgeview Post Office

View Details Call Now (605) 733-2400

Ridgeview Post Office

Address
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Hours

Whitehorse Post Office

View Details Call Now (605) 733-2520

Whitehorse Post Office

Address
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Hours

Timber Lake Post Office

View Details Call Now (605) 865-3622

Timber Lake Post Office

Address
Get Direction
Hours

Residents of Dewey County can use the USPS online location finder to identify the nearest post office, rural branch, or contract postal unit and check their individual hours. Enrolling in USPS Informed Delivery is free and lets all county residents preview incoming mail and packages via email or the USPS app each morning before delivery.

You may also find Post Office locations in neighboring counties including Dewey, Corson.