Riel is a unisex given name, of Welsh origin, meaning "leader" or "lion". It has been used by both sexes throughout history but remains relatively uncommon. The name gained some popularity in the late 20th century and early 21st century due to its association with notable figures such as Canadian Métis leader Louis Riel. However, it is not typically associated with any particular culture or nationality beyond its Welsh roots. Those named Riel may be referred to by the familiar diminutive forms Ri or Riley. The name's day, if any, varies depending on the calendar and region.
The name Riel experienced a steady increase in popularity from 2007 to 2013 with peak years being 2012 and 2013. However, since then, the number of births has decreased annually, reaching its lowest point in 2015 and 2017 with only five births each year. Despite this recent decline, there was a slight rebound in 2018 and 2020 with nine births recorded each year. Overall, over the span of these years, Riel has been given to 86 newborns.