| Aldo Junior Simoncini | |
| Birth Date: | 30 August 1986 |
| Birth Place: | City of San Marino, San Marino |
| Currentclub: | S.S. Cosmos |
| Clubnumber: | 1 |
| Position: | Goalkeeper |
| Years1: | 2004–2005 |
| Clubs1: | Modena |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 2005–2006 |
| Caps2: | 15 |
| Goals2: | 0 |
| Years3: | 2006–2009 |
| Clubs3: | San Marino Calcio |
| Caps3: | 3 |
| Goals3: | 0 |
| Years4: | 2009–2011 |
| Caps4: | 44 |
| Goals4: | 0 |
| Years5: | 2011–2012 |
| Clubs5: | Cesena |
| Caps5: | 0 |
| Goals5: | 0 |
| Years6: | 2012 |
| Clubs6: | → Valenzana (loan) |
| Caps6: | 0 |
| Goals6: | 0 |
| Years7: | 2012–2018 |
| Clubs7: | A.C. Libertas |
| Caps7: | 104 |
| Goals7: | 0 |
| Years8: | 2018–2022 |
| Clubs8: | S.P. Tre Fiori |
| Caps8: | 76 |
| Goals8: | 0 |
| Years9: | 2022– |
| Clubs9: | S.S. Cosmos |
| Caps9: | 64 |
| Goals9: | 0 |
| Nationalyears1: | 2006–2023 |
| Nationalcaps1: | 65 |
| Nationalgoals1: | 0 |
| Club-Update: | 1 June 2024 |
| Ntupdate: | 20 November 2023 (UTC) |
Aldo Junior Simoncini (born 30 August 1986) is a Sammarinese footballer who plays as a goalkeeper for Sammarinese club S.S. Cosmos.
At the age of 19 his career was nearly ended after he suffered serious injuries in a car crash.
Simoncini was signed by Italian club Cesena in 2011. In January 2012 he was signed by Valenzana on a loan deal.[1]
Simoncini and his twin brother, Davide, both scored an own goal each against Sweden on 7 September 2010, becoming the first twins to accomplish such a feat in an international competition.[2]
Simoncini combined his football career with a job as an accountant,[3] and also as a computer engineer.[4]