Theresa L. Ibsgaard, 46 of Sioux City passed away Sunday, January 1, 2017 at a Sioux City Hospital. Memorial Services will be 6:30 P.M. Thursday, January 12, 2017 at Becker – Hunt Funeral Home with Rev. Clyde Pritchett officiating. Theresa was born April 3, 1970 in Sioux City the daughter of Robert W. and Sandra S. (Fredrickson) Ibsgaard. She graduated from high school. She was employed in construction, a cook at the Glass Palace and also a Security Guard. She attended Cross Roads Evangelical Church in South Sioux City. Survivors include her significant other Heather Mlejnek and children Castle and Kala-Ann Mlejnek all of Sioux City, and her care givers Stormy Martinson, Dallas Plunkett and Conner Lund, three brothers; Robert Childers of Sioux City, Jason Vanthyne of Sergeant Bluff and Jeremy Vanthyne of Sioux City. She was preceded in death by her parents and two brothers: David Ibsgaard and Alfred Vanthyne, Jr.