Long-tailed pocket mouse

{{Short description|Species of rodent}}

{{Speciesbox

| name = Long-tailed pocket mouse

| image = Chaetodipus formosus imported from iNaturalist photo 10634696 on 13 June 2019.jpg

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Álvarez-Castañeda, S.T. |author2=Castro-Arellano, I. |author3=Lacher, T. |date=2016 |title=Chaetodipus formosus |volume=2016 |page=e.T4331A22226290 |doi=10.2305/IUCN.UK.2016-2.RLTS.T4331A22226290.en |access-date=11 November 2021}}

| genus = Chaetodipus

| species = formosus

| authority = (Merriam, 1889)

| synonyms =

}}

The long-tailed pocket mouse (Chaetodipus formosus) is a species of rodent in the family Heteromyidae.

It is found in Arizona, California, Nevada and Utah in the United States and Baja California in Mexico.