Ninia diademata

{{Short description|Species of snake}}

{{speciesbox

| image =

| status = LC

| status_system = IUCN3.1

| status_ref ={{cite iucn |author=Lee, J. |author2=Calderón Mandujano, R.|author3=Ariano, D. |year=2013 |title=Ninia celata |page=e.T63858A3130417 |doi=10.2305/IUCN.UK.2013-2.RLTS.T63858A3130417.en |access-date=2 December 2021}}

| genus = Ninia

| species = diademata

| authority = Baird & Girard, 1853

| synonyms =

| range_map =

}}

Ninia diademata, the ringneck coffee snake, is a species of snake in the family Colubridae. The species is native to Mexico, Belize, Guatemala, and Honduras.{{cite web |title=Ninia diademata BAIRD & GIRARD, 1853 |url=https://reptile-database.reptarium.cz/species?genus=Ninia&species=diademata|publisher=Reptile Database |accessdate=23 January 2019}}