Sioux County Sheriff

To serve & Protect


As a law enforcement agency, called to serve the public, we have done our best to build trust with the people we serve.

We continue to be committed to our Vision Statement:

The Sioux County Sheriff’s Office will be dedicated to preserving a high quality of life and the enhancement of public safety. We will be committed to serve with professionalism, diligence, respect, integrity and concern for all people. We will foster an environment in which the sheriff’s office and the community work together as catalysts for positive community development.

Our men and women enter this profession with a sincere desire to preserve and respect the sanctity of life.

We pledge that we will continue to offer our hand to build community partnerships and maintain an environment of openness and respect for all whom we serve.

  • Sheriff Dan Altena



Latest news & Announcements

Fatal motor vehicle accident near Rock Valley – September 22

September 23, 2020

On Tuesday, September 22, at 10:16 p.m., the Sioux County Sheriff’s Office investigated a fatal motor vehicle accident that occurred at the intersection of 340th Street and Eagle Avenue, three miles south of Rock Valley, IA. Stephen Richter, age 61, of Rock Valley was driving a 1995 Freightliner straight truck westbound on 340th Street. Robert … Read more Fatal motor vehicle accident near Rock Valley – September 22

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Sioux County burn ban

September 22, 2020

On Tuesday, September 22, fire chiefs representing each fire department in Sioux County requested the Iowa State Fire Marshal to prohibit open burning in Sioux County. The State Fire Marshal found that conditions are such that open burning constitutes a danger to life and property. Effective Wednesday, September 23, at 6:00 a.m., no person in … Read more Sioux County burn ban

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*Scam Alert* Calls from people claiming to be from Apple Support

September 11, 2020

Scammers claiming to be from Apple Support are calling people and telling them that their account has been breached. They then ask you to give them your personal information. The calls came are coming from local numbers, i.e. 712-441-XXXX. Do not respond to the requests for any personal information and disconnect the call; this is … Read more *Scam Alert* Calls from people claiming to be from Apple Support

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Sheriff addresses misleading information

September 3, 2020

I was recently informed of some misleading and false information regarding how the Sheriff’s Office is handling the pandemic. Information like this can unnecessarily spread fear and distrust. Therefore I feel it’s important for the public to know how and why we are handling things as we are. This pandemic is something none of us … Read more Sheriff addresses misleading information

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Iowa COVID-19 website

May 27, 2020

The Sioux County Sheriff’s Office wants to keep all of our citizens informed by sharing a very useful website with information and resources about COVID-19 in Iowa. You can access that website here: COVID-19 in Iowa

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Shooting death leads to arrest – May 9 *UPDATED*

May 27, 2020

*UPDATED RELEASE: MAY 27* The Sioux County Sheriff’s Office investigation into the murder of Grant Wilson, has led to a change in the original charge of 2nd degree murder that was filed against Gregg Winterfeld. After discussion with the Sioux County Attorney, on Friday, May 22, the attorney’s office amended the charge against Winterfeld to … Read more Shooting death leads to arrest – May 9 *UPDATED*

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