| Marcinho | |
| Fullname: | Márcio Barbosa Vieira Junior |
| Birth Date: | 1995 7, df=yes |
| Birth Place: | Londrina, Brazil |
| Position: | Midfielder |
| Currentclub: | Al-Nasr Benghazi |
| Youthyears1: | 2014 |
| Youthclubs1: | Londrina |
| Years1: | 2015–2018 |
| Caps1: | 49 |
| Goals1: | 2 |
| Years2: | 2016 |
| Clubs2: | → Operário-PR (loan) |
| Caps2: | 9 |
| Goals2: | 2 |
| Years3: | 2018 |
| Clubs3: | → Oeste (loan) |
| Caps3: | 27 |
| Goals3: | 2 |
| Years4: | 2019 |
| Caps4: | 6 |
| Goals4: | 1 |
| Years5: | 2019 |
| Caps5: | 3 |
| Goals5: | 2 |
| Years6: | 2020 |
| Caps6: | 40 |
| Goals6: | 9 |
| Years7: | 2021 |
| Caps7: | 32 |
| Goals7: | 2 |
| Years8: | 2022 |
| Caps8: | 10 |
| Goals8: | 1 |
| Years9: | 2022 |
| Caps9: | 10 |
| Goals9: | 0 |
| Years10: | 2023 |
| Caps10: | 14 |
| Goals10: | 0 |
| Years11: | 2023 |
| Clubs11: | → Sampaio Corrêa (loan) |
| Caps11: | 19 |
| Goals11: | 1 |
| Years12: | 2023– |
| Caps12: | 0 |
| Goals12: | 0 |
| Club-Update: | 9 September 2023 |
Márcio Barbosa Vieira Junior (born 28 July 1995), commonly known as Marcinho, is a Brazilian footballer who plays as a midfielder for Libyan club Al-Nasr Benghazi.
Marcinho began his career at Londrina, representing the team in 2015 Campeonato Brasileiro Série C and 2016 Campeonato Brasileiro Série B. In 2018 he was loaned to Oeste for the 2018 Campeonato Brasileiro Série B season, and in 2019 he was loaned to Brasil de Pelotas in a loan-exchange deal with Hélder Maurílio.[1]
In August 2019, though having bids from Portugal, Marcinho ended op joining Manama Club in Bahrain.[2]