Two eastern Iowa casinos make up large share of statewide casino revenue gains Ethan Stein, KCRG-TV · January 26, 2022 at 8:09 pm Documents show casinos statewide are making more money [than] before the pandemic started, but a few casinos are creating a majority of those increases. Cedar Rapids officials have continually talked about casinos earning record profits when arguing for a casino in Linn County. Data from the Iowa Racing and Gaming Commission shows different revenues when looking at specific casinos. For example, The Diamond Jo in Dubuque is taking in less money during the 2021 fiscal year compared to the 2018 fiscal year. However, the Riverside Casino and Golf Resort saw a $30 million increase in revenue in three years. That is an increase of around 36%.