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.

Staff

Aaron McGowan

State's Attorney Send an Email

Jennie Thompson

Paralegal Send an Email

April Lund

Victim / Witness and Legal Assistant Send an Email

Contact Information

Main Office

Address:
Lake County States Attorney
200 E Center St
Madison SD 57042

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

Announcements

Real Estate & Mobile Home Taxes - First Half Deadline
Wednesday, April 15, 2026

Lake County property owners have until April 30th to pay the 1st half of their 2025 due in 2026 real estate & mobile home taxes without a penalty. The 2025 taxes can be paid at Treasurer’s Office, located on the 1st floor of the courthouse from 8 a.m.- 5 p.m. Mon-Fri. Payments can also be placed in the drop box located in the vestibule at the north entrance of the courthouse or be mailed. If mailed, it must be postmarked no later than April 30th. Interest will be added to all delinquent taxes

Mailed Tax Payments
Wednesday, April 15, 2026

Mail payments early to allow for processing. The USPS only postmarks mail once it is received at a processing center, it no longer is stamped at the local post office at the time of drop off. Visit with the clerk at your USPS office to have your mail hand stamped to make sure it has a valid postmark. If the payment isn’t received by Thursday, April 30th it must have a valid postmark to be considered timely. Receipts will only be returned if you enclose a stamped self- addressed envelope.

Real Estate & Mobile Home Taxes - First Half
Wednesday, April 1, 2026

First half of Real Estate and Mobile Home Taxes due by the end of April. Please bring your tax notices with you. Tax payments must be made for the exact amount only.
Tax payments may be sent to the Treasurer's Office at 200 E. Center St, Madison, SD 57042 and MUST be postmarked by April 30. Please send your tax stubs to ensure proper credit to the correct parcels of land. Please note: Payments received or postmarked after April 30th will reflect a late fee and interest.

Property Tax Payment Drop Box
Wednesday, April 1, 2026

The Treasurer's Office also offers a drop box for property tax payments located between the double doors of the north entrance to the courthouse. Payments must include the payment coupon or parcel number with each payment and be in the exact amount only (all others will be returned). If you would like a receipt, please include a self-addressed stamped envelope. Payments dropped off after 4:30 p.m., M-F will be credited the following business day.

CUP/Variance Deadline 4/27/2026
Sunday, March 15, 2026

CUP/Variance Applications due for consideration for the May 19th meeting

Drivers Exam closed
Monday, February 23, 2026

Due to staffing, the drivers exam, located at the 4-H grounds, is closed until further notice

Lake County © 2026. Developed by Intuvio Solutions.

Stay Connected: