The 1920 South American Championships in Athletics were held in Santiago, Chile between 23 and 25 April.

Event	Gold		Silver		Bronze
100 metres	Marcelo Uranga  Chile	10.8 CR, AR	Julio Gorlero  Uruguay	11.0	Humberto Ramírez  Chile
200 metres	Isabelino Gradín  Uruguay	22.4 CR, AR	Humberto Ramírez  Chile	22.6	Julio Gorlero  Uruguay	23.4
400 metres	Isabelino Gradín  Uruguay	54.0	Eduardo Flores  Uruguay	54.6	Gavino Reginato  Chile
800 metres	Enrique Thompson  Argentina	2:06.2	Juan Campos  Uruguay	2:06.4	Carlos Escobar  Chile	2:06.8
1500 metres	Ángel Entrecasas  Argentina	4:23.2 CR	Juan Marshall  Chile	4:23.4	Oscar Guajardo  Chile	4:26.2
5000 metres	Juan Jorquera  Chile	16:11.4 CR	Manuel Moraga  Chile	16:21.8	Manuel Plaza  Chile	16:29.4
10,000 metres	Juan Jorquera  Chile	33:13.6 CR	Manuel Plaza  Chile	33:18.2	Enrique Calderón  Chile
110 metres hurdles	Harold Rosenqvist  Chile	16.4 CR	Carlos Patiño  Uruguay	16.6	Otto Dietsch  Argentina
200 metres hurdles	Harold Rosenqvist  Chile	26.2 CR	Andrés Mazzali  Uruguay	26.8	Francisco Silveira  Uruguay
400 metres hurdles	Andrés Mazali  Uruguay	59.0 CR	Eduardo Diez  Chile	59.8	Francisco Silveira  Uruguay
4 × 400 metres relay	Uruguay Mario Herrera Eduardo Venancio Flores Francesco Silveira Isabelino Gradín	3:34.0 CR	Argentina Agustín Garay José Pozzi Enrique Thompson Teodoro Borschmann
High jump	Hernán Orrego  Chile	1.76 CR	Carlos Patiño  Uruguay	1.75	Osvaldo Kolbach  Chile	1.70
Standing high jump	Juan Moliné  Argentina	1.44 CR	Carlos Asiadacz  Chile	1.43	Carlos Fernández  Uruguay	1.42
Pole vault	Héctor Berruti  Uruguay	3.26 CR	Ernesto Goycolea  Chile	3.25	Enrique Sansot  Chile	3.20
Long jump	Ricardo Müller  Chile	6.52	Fortunato Antola  Uruguay	6.11	Héctor Benapres  Chile	6.10
Standing long jump	Francisco Japke  Chile	3.00	Hernán Orrego  Chile	2.98	Juan Moliné  Argentina	2.95
Triple jump	Adolfo Reccius  Chile	13.40 CR	Héctor Benapres  Chile	13.21	Erwin Gevert  Chile	12.69
Shot put	Benigno Rodríguez  Argentina	11.96 CR	Teodoro Scheihing  Chile	11.54	Jorge Llobet Cullen  Argentina	11.50
Discus throw	Jorge Llobet Cullen  Argentina	35.28	David Martín Estévez  Uruguay	34.64	Gustavo Krüger  Chile	34.55
Hammer throw	Leonardo de Lucca  Uruguay	34.14 CR	Jorge Llobet Cullen  Argentina	33.05	Teodoro Scheihing  Chile	32.97
Javelin throw	Arturo Medina  Chile	49.49 CR	Héctor Berruti  Uruguay	41.51	Alberto Asenjo  Chile	40.90

Rank	Nation	Gold	Silver	Bronze	Total
1	Chile (CHI)	10	10	13	33
2	Uruguay (URU)	6	9	4	19
3	Argentina (ARG)	5	2	3	10
Totals (3 entries)		21	21	20	62

• Men Results – GBR Athletics
• Women Results – GBR Athletics