Stormwater wetlands are just one of many stormwater treatment practices (STPs) that can be used to mitigate the water quality and quantity impacts resulting from land development. When properly sited and used in conjunction with other runoff reduction practices, stormwater wetlands can be very effective practices to protect downstream water resources because they mimic the pollutant removal and flood control functions of natural wetlands. They have welldocumented pollutant removal rates, are widely adaptable to different climates, and can provide a host of secondary benefits, including aesthetics and wildlife habitat. However, few new stormwater wetlands are currently being installed in communities across the U.S., due, in large part, to both real and perceived limitations about their performance. In the hopes of rejuvenating their use as an STP, this article presents information about a new generation of stormwater wetlands with improved performance and community acceptance. This article provides a look back at the evolution of stormwater wetland design and summarizes lessons learned from implementation to guide the next generation.