Marathoners by nation
| Portugal | M | Armando | Aldegalega | Munich 1972 | 2:28:24 | 41 | |
| Portugal | M | Armando | Aldegalega | Tokyo 1964 | 2:38:02.2 | 44 | |
| Portugal | M | Cidálio | Caetano | Los Angeles 1984 | DNF | ||
| Portugal | M | Domingos | Castro | Sydney 2000 | 2:16:52 | 18 | |
| Portugal | M | Dionísio | Castro | Barcelona 1992 | DNF | ||
| Portugal | M | Domingos | Castro | Atlanta 1996 | 2:18:03 | 25 | |
| Portugal | M | Paulo | Catarino | Seoul 1988 | DNF | ||
| Portugal | M | Alberto | Chaica | Athens 2004 | 2:14:17 | 8 | |
| Portugal | M | António Pinto | Coelho | Atlanta 1996 | 2:16:41 | 14 | |
| Portugal | M | António Pinto | Coelho | Barcelona 1992 | DNF | ||
| Portugal | M | António Pinto | Coelho | Sydney 2000 | 2:15:17 | 11 | |
| Portugal | M | Mathias | de Carvalho | Stockholm 1912 | DNS | ||
| Portugal | M | Manuel | Dias | Berlin 1936 | 2:49:00.0 | 17 | |
| Portugal | M | Luis | Feiteira | London 2012 | 2:19:40 | 48 | |
| Portugal | M | Paulo | Gomes | Beijing 2008 | 2:18:15 | 30 | |
| Portugal | M | Francisco | Lázaro | Stockholm 1912 | DNF | ||
| Portugal | M | Carlos | Lopes | Los Angeles 1984 | 2:09:21 | 1 | |
| Portugal | M | Manuel | Matias | Atlanta 1996 | 2:20:58 | 46 | |
| Portugal | M | Jaime | Mendes | Berlin 1936 | DNF | ||
| Portugal | M | Delfim | Moreira | Los Angeles 1984 | DNF | ||
| Portugal | M | Luís | Novo | Sydney 2000 | 2:23:04 | 50 | |
| Portugal | M | Hélder | Ornelas | Beijing 2008 | 2:23:20 | 46 | |
| Portugal | M | Joaquim | Pinheiro | Barcelona 1992 | DNF | ||
| Portugal | M | Anacleto | Pinto | Moscow 1980 | 2:17:04 | 16 | |
| Portugal | M | Anacleto | Pinto | Montreal 1976 | 2:18:53 | 22 | |
| Portugal | M | Ricardo | Ribas | Rio 2016 | 2:38:29 | 134 | |
| Portugal | M | Barata | Samuel | Paris 2024 | 2:13:23 | 48 | |
| Portugal | M | Joaquim | Silva | Seoul 1988 | 2:18:05 | 27 | |
| Portugal | M | Rui Pedro | Silva | London 2012 | DNF | ||
| Portugal | M | Rui Pedro | Silva | Rio 2016 | 2:30:52 | 123 | |
| Number of unique men participants: 24 | |||||||
| Portugal | F | Jessica | Augusto | Rio 2016 | DNF | ||
| Portugal | F | Jéssica | Augusto | London 2012 | 2:25:11 | 7 | |
| Portugal | F | Marisa | Barros | Beijing 2008 | 2:34:08 | 32 | |
| Portugal | F | Marisa | Barros | London 2012 | 2:26:13 | 13 | |
| Portugal | F | Rita | Borralho | Los Angeles 1984 | 2:50:58 | 38 | |
| Portugal | F | Aurora | Cunha | Barcelona 1992 | DNF | ||
| Portugal | F | Aurora | Cunha | Seoul 1988 | DNS | ||
| Portugal | F | Ana | Dias | Beijing 2008 | 2:36:25 | 46 | |
| Portugal | F | Albertina | Dias | Atlanta 1996 | 2:36:39 | 27 | |
| Portugal | F | Ana | Dias | Athens 2004 | 3:08:11 | 62 | |
| Portugal | F | Ana Dulce | Félix | London 2012 | 2:28:12 | 21 | |
| Portugal | F | Ana Dulce | Felix | Rio 2016 | 2:30:39 | 16 | |
| Portugal | F | Maria | Ferreira | Los Angeles 1984 | 2:50:58 | 39 | |
| Portugal | F | Conoeicão | Ferreira | Seoul 1988 | 2:34:23 | 20 | |
| Portugal | F | Manuela | Machado | Sydney 2000 | 2:32:29 | 21 | |
| Portugal | F | Albertina | Machado | Atlanta 1996 | 2:43:44 | 47 | |
| Portugal | F | Manuela | Machado | Barcelona 1992 | 2:38:22 | 7 | |
| Portugal | F | Manuela | Machado | Atlanta 1996 | 2:31:11 | 7 | |
| Portugal | F | Inês | Monteiro | Beijing 2008 | DNF | ||
| Portugal | F | Sara | Moreira | Tokyo 2020 | DNF | ||
| Portugal | F | Sara | Moreira | Rio 2016 | DNF | ||
| Portugal | F | Rosa | Mota | Los Angeles 1984 | 2:26:57 | 3 | |
| Portugal | F | Rosa | Mota | Seoul 1988 | 2:25:40 | 1 | |
| Portugal | F | Sara Catarina | Ribeiro | Tokyo 2020 | 2:55:01 | 70 | |
| Portugal | F | Salome | Rocha | Tokyo 2020 | 2:34:52 | 30 | |
| Portugal | F | Helena | Sampaio | Athens 2004 | 2:49:18 | 47 | |
| Portugal | F | Susana | Santos | Paris 2024 | 2:35:57 | 57 | |
| Number of unique women participants: 20 | |||||||
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