About Us

Riverside Plastics was started in a small building along the banks of the Des Moines River in Bonaparte, Iowa, in 1970 to help meet the growing demand for injection-molded plastic parts. Our now 70,000 square foot facility houses two molding rooms with presses ranging from 30 tons to 730 tons. Our modern, full-service toolroom allows us to react quickly to our customers’ needs. Our talented and experienced workers are dedicated to the simple philosophy which has always guided our approach to business: Provide customers with superior quality and service at a fair price, and the rest will take care of itself.