William "Bill" C. Spielmann, of Sioux Falls, South Dakota, passed away at his home on Monday, November 24, 2025, at the age of 57.

William Calvin Spielmann was born on March 13, 1968, to William M. and Connie L. (Thorne) Spielmann in Sioux Falls. Bill attended public school in Sioux Falls and graduated from Washington High School in 1986.

He worked as a maintenance technician for Daktronics in Sioux Falls, South Dakota for several years.

In his spare time, Bill enjoyed fishing and spending time with his companion dog, Koda.

Bill is survived by his brothers, Tom (Connie) Spielmann and Joseph Spielmann, and his nephew, Austin Spielmann. He was preceded in death by his parents, William M. and Connie L. Spielmann.

Bill will be laid to rest next to his parents at St. George Catholic Cemetery in Hartford, South Dakota.