Mandell Clark, 37, is being sought by the Fort Dodge Police Department on three felony charges, including sexual abuse.
Clark is accused of sexually assaulting a 45-year-old woman in the area of the 800 block of 1400 10th Ave. S.W., according to Police Chief Tim Carmody.
The alleged incident happened on Saturday around 2:15 a.m.
Officers with the Fort Dodge/Webster County Special Emergency Response Team (SERT) searched 1229 Sixth Ave. N. in an attempt to find Clark, but he wasn't there.
Clark is described as a black man, 5 feet 11 inches and 270 lbs. He has black hair with a receding hairline and brown eyes.
Anybody with information on Clark is asked to call the Fort Dodge Police Department at 573-1426 or Crime Stoppers at 573-1444. Tips can also be submitted online at wccrimestoppers.com or by texting "LEC" and the tip to 274637.