South Dakota Business Entity Search
South Dakota’s business register is kept by the South Dakota Secretary of State. Here is its official search and how to use it.
We don’t search South Dakota’s registry yet
To find a South Dakota LLC or corporation, use the official search — it’s the authoritative record.
Open the official South Dakota searchSouth Dakota Secretary of State · sosenterprise.sd.gov
How to search it
- Open the official search and choose a search by business or entity name.
- Type a distinctive part of the name; leave out “LLC” or “Inc.” if nothing comes up.
- Open the matching record to see its status, filing history and registered agent, as far as the state publishes them.
You can still check companies on USACIP
USACIP searches companies registered with the SEC, nonprofits in IRS data, federal records, and the state registries we already cover.
The official South Dakota record
- Registry
- South Dakota Secretary of State
- Official search
- sosenterprise.sd.gov
State business searches generally show a company’s legal name, entity type, status, formation date and registered agent; some also list officers or managers. Exactly what South Dakota publishes is on its official record.
Choosing a name for a new South Dakota LLC?
See which similar names are already registered before you file.
Business name search →FAQ
How do I look up a business in South Dakota?
Use the official business search of the South Dakota Secretary of State: https://sosenterprise.sd.gov/BusinessServices/Business/FilingSearch.aspx.
Does USACIP search South Dakota companies?
Not South Dakota’s registry yet. USACIP can still find companies through SEC filings, IRS nonprofit data and federal records. For South Dakota filings, use the official South Dakota Secretary of State search.
How do I check if a business name is available in South Dakota?
Search the name on the official South Dakota Secretary of State site first: a name already on file there is a sign it may be taken. The state makes the final decision when you file or reserve the name.
State facts on this page were checked on the official sources linked above on October 7, 2026. USACIP is not affiliated with the South Dakota Secretary of State.
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