Mariana Pion

{{short description|Uruguayan footballer (born 1992)}}

{{EngvarB|date=May 2022}}

{{Use dmy dates|date=November 2020}}

{{family name hatnote|Pion|Núñez|lang=Spanish}}

{{Infobox football biography

| name = Mariana Pion

| image = Mariana_Pion_2019_MFCvsForta.jpg

| image_size = 230

| caption = Pion playing for Colombian club Millonarios FC

| fullname = Mariana Alejandra Pion Núñez{{Soccerway|606733}}

| birth_date = {{Birth date and age|df=yes|1992|12|19}}

| birth_place = San José de Mayo, Uruguay

| height = 1.52 m

| position = Midfielder

| currentclub = Libertad/Limpeño

| clubnumber =

| years1 = 2011–2014

| clubs1 = Nacional

| caps1 =

| goals1 =

| years2 = 2014–2016

| clubs2 = Colón

| caps2 = 37

| goals2 = 31

| years3 = 2017

| clubs3 = River Plate Montevideo

| caps3 = 10

| goals3 = 2

| years4 = 2017

| clubs4 = Sportivo Limpeño

| caps4 =

| goals4 =

| years5 = 2018

| clubs5 = Atlético Nacional

| caps5 =

| goals5 =

| years6 = 2019

| clubs6 = Osasco Audax

| caps6 = 6

| goals6 = 0

| years7 = 2019

| clubs7 = Millonarios

| caps7 =

| goals7 =

| years8 = 2020–

| clubs8 = Libertad/Limpeño

| nationalyears1 = 2012

| nationalteam1 = Uruguay U20

| nationalcaps1 = 1+

| nationalgoals1 = 1

| nationalyears2 = 2014–

| nationalteam2 = Uruguay

| nationalcaps2 = 13

| nationalgoals2 = 1

| pcupdate = 15 May 2019

| ntupdate = 25 May 2025

}}

Mariana Alejandra Pion Núñez (born 19 December 1992) is a Uruguayan professional footballer who plays as a midfielder for Paraguayan Women's Championship club Libertad/Limpeño and the Uruguay women's national team.