The 2000 ITF Seniors World Individual Championships took place on 29 October - 5 November in Buenos Aires, Argentina.
The champions in each age category are listed below, or click the link to view the full results and drawsheets from the tournament.
- Results and drawsheets
35s
- Men's singles: Jaroslav Bulant (CZE)
- Men's doubles: Ricardo Rivera (ARG) / Gustavo Tiberti (ARG)
- Women's singles: Raquel Contreras (MEX)
- Women's doubles: Beatrix Mezger-Reboul (GER) / Cora Salimei (ARG)
40s
- Men's singles: Patrick Serrett (AUS)
- Men's doubles: Mike Fedderly (USA) / Paul Smith (USA)
- Women's singles: Gabriela Groell-Dinu (GER)
- Women's doubles: Ros Balodis (AUS) / Kaye Nealon (AUS)
45s
- Men's singles: Victor Pecci (PAR)
- Men's doubles: Michael Collins (AUS) / Wayne Pascoe (AUS)
- Women's singles: Elly Appel (NED)
- Women's doubles: Ann Brown (GBR) / Pauline Fisher (GBR)
50s
- Men's singles: Bruno Renoult (FRA)
- Men's doubles: Paulo Lopes (BRA) / Jose Rodrigues (BRA)
- Women's singles: Heidi Eisterlehner (GER)
- Women's doubles: Elizabeth Allan (AUS) / Carol Campling (AUS)