| Competition: | V Torneo Argentino A |
| Season: | 1999–00 |
| Winners: | General Paz Juniors (1st divisional title) |
| Promoted: | General Paz Juniors |
| Relegated: | Estudiantes (RC) |
| Biggest Home Win: | Huracán (TA) 6–0 Huracán |
| Biggest Away Win: | Patronato 0–3 Dep. Barraca |
| Highest Scoring: | CAI 4–4 Juventud Alianza Tiro Federal 6–2 Dep. Barraca |
| Prevseason: | 1998–99 |
| Nextseason: | 2000–01 |
The 1999–00 Argentine Torneo Argentino A[1] was the fifth season of third division professional football in Argentina. A total of 16 teams competed; the champion was promoted to Primera B Nacional.
| Club | City | Stadium | |
|---|---|---|---|
| CAI | Comodoro Rivadavia | Estadio Municipal | |
| Cultural Argentino | General Pico | El Volcán | |
| Estudiantes | Río Cuarto | Ciudad de Río Cuarto | |
| General Belgrano | Santa Rosa | Nuevo Rancho Grande | |
| General Paz Juniors | Córdoba | General Paz Juniors | |
| Huracán (SR) | San Rafael | Pretel Hermanos | |
| Huracán (TA) | Tres Arroyos | Roberto Lorenzo Bottino | |
| Juventud Alianza | Santa Lucía | Bosque del Bajo Grande |
| Club | City | Stadium | |
|---|---|---|---|
| 13 de Junio | Pirané | Pirané | |
| Ben Hur | Rafaela | Parque Barrio Ilolay | |
| Deportivo Barraca | Paso de los Libres | Agustín Faraldo | |
| Douglas Haig | Pergamino | Miguel Morales | |
| Huracán Corrientes | Corrientes | José Antonio Romero Feris | |
| Ñuñorco | Monteros | Ñuñorco | |
| Patronato | Paraná | Presbítero Bartolomé Grella | |
| Tiro Federal | Rosario | Fortín de Ludueña |