Bookmakers had already signed with most teams in the Brazilian football league, Brasileirao.
The UK-based company Betfred has signed an agreement with Elite Casino Resorts to offer sports betting operations in Iowa.
IBIA reported a decrease in suspicious activity around betting during the second quarter of the year.
As the segment gets ready to launch in the state, some eastern Iowa casinos have confirmed their sports betting partner will be William Hill US.
The lottery director of West Virginia said that sports betting, which is legalised, can be difficult.