Sibon dunni

{{Short description|Species of snake}}

{{Speciesbox

| image = Sibon dunni (10.3897-zookeys.766.24523) Figure 2 (cropped).jpg

| image_caption =

| status = DD

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Cisneros-Heredia, D.F. |date=2016 |title=Sibon dunni |volume=2016 |page=e.T177554A54446026|url=https://www.iucnredlist.org/species/177554/54446026|access-date=20 November 2021}}

| genus = Sibon

| species = dunni

| authority = (J. A. Peters, 1957)

}}

Sibon dunni, also known as Dunn's snail sucker, is a species of snake in the family, Colubridae. It is found in Ecuador.