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State's Attorney

gavel and flagSTATE’S ATTORNEY
Manuel J. de Castro, Jr.

Jennie Thompson
Shelli Gust


Lake County States Attorney
200 E Center St
Madison SD 57042

Phone:  605-256-7630
Fax:  605-256-7632

State’s Attorney:

Office Hours:

  • 8:00 am – 5:00 pm (Call for appointment)
  • Monday – Friday (excluding Holidays)
  • Located on the 2nd Floor of the Public Safety Building (PSB) at 219 NE 1st Street – Please use East Entrance.

Committed to public safety, community service,
and equal justice under the law

The Lake County State's Attorney serves the citizens of our county and of South Dakota as the chief prosecutor of adult and juvenile crimes occurring in Lake County.  The office is committed to helping to preserve the quality of life and low crime rates enjoyed by those who reside in South Dakota.

While the principal responsibility of the office is the prosecution of adult and juvenile crime, the office has the duty of protecting children who may be living in abusive or neglectful homes.  Additionally, the office is responsible for providing legal advice and representation to the Board of Commissioners for the county and other elected and appointed department heads and staff.

Lake County has a population base of approximately 11,200; Madison is the county seat.

On this site you will find information about the office and staff and the services provided by the office.

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