| Obelisco | | tango | | | | Z0999914767 | 0 | 0 | 0 | | info |
| Obrerita | | tango | Adrián Russo | Eugenio Cárdenas | | T0370076371 | 1 | 4 | 0 | | info |
| Obsesión | | tango | Eduardo Requena | Adolfo Crosa | | Z0999918783 | 0 | 0 | 0 | | info |
| Obsesión | | tango | | | | Z0999900580 | 1 | 1 | 0 | | info |
| Obsesión | | tango | Ernesto Baffa, Salvador Grecco | | | T0373311831 | 0 | 0 | 0 | | info |
| Ocaso | | tango | | | | Z0999900985 | 1 | 3 | 0 | | info |
| Ocho horas ¡Punto! | | tango | Ariel Ascheri | | | Z0999916840 | 0 | 0 | 0 | | info |
| Ocre Buenos Aires | | tango | Juan D'Argenton | - | | T0373301677 | 2 | 2 | 0 | | info |
| Octubre | | tango | Osvaldo Piro | - | | T0371561760 | 1 | 1 | 0 | | info |
| Ocurrencia en marcha | | tango | | - | | Z0999917024 | 0 | 0 | 0 | | info |
| Oda a Floresta | | tango | Ernesto Baffa, Néstor Marconi | - | | T0372103359 | 1 | 1 | 0 | | info |
| Oda para un hippie | | tango | Astor Piazzolla | - | | T9007713282 | 2 | 2 | 0 | | info |
| Ofrenda maleva | | tango | Guillermo Cavazza | Jacinto Font | | T0370021729 | 1 | 5 | 0 | | info |
| Oh mamá mía | | tango | Rodolfo Biagi | Carlos Marín | | T0370455585 | 2 | 3 | 0 | | info |
| Oh, penas mías! | | tango | | | | Z0999912796 | 0 | 0 | 0 | | info |
| Oído al fuelle | | tango | Hugo Galli | - | | Z0999918167 | 0 | 0 | 0 | | info |
| Oiga! | | tango | Edgardo Donato | Francisco Antonio Bastardi | | T0370149191 | 2 | 9 | 0 | | info |
| Oiga, amigo! | | tango | Julio Plácido Navarrine | Alfredo Navarrine | | T0370149215 | 2 | 6 | 0 | | info |
| Oiga, aparcero | Oiga compadre | tango | Agustín Bardi | Francisco García Jiménez | | T0370149248 | 2 | 5 | 0 | C | info |
| Oiga, garçon | | tango | | | | Z0999901223 | 1 | 4 | 0 | | info |
| Oiga, mozo | | tango | Héctor Varela | Alberto Nery | | T0370190412 | 2 | 10 | 0 | | info |
| Oigan qué twist | | tango | Eduardo Rovira, Carlos Antonio Russo, Rosa Virginia Brameri | Eduardo Rovira, Carlos Antonio Russo, Rosa Virginia Brameri | | T0370547662 | 0 | 0 | 0 | | info |
| Oiga patron! | | tango | Francisco Betoret, Julio Murillo, Jaime Planas | Gerardo Alcazar | | T0416941848 | 0 | 0 | 0 | | info |
| Oiga, viejo | | tango | Antonio Bonavena | | | Z0999901336 | 1 | 1 | 0 | | info |
| Oigo tu voz | | tango | Mario Canaro | Francisco García Jiménez | | T0370175555 | 3 | 20 | 1 | | info |
| Oi malevo | | tango | Juan José Buscaglia | | | Z0999901106 | 1 | 3 | 0 | | info |
| Oíme, ciudad mía | | tango | Carmen Guzmán | Héctor Negro | | T0374259398 | 0 | 0 | 0 | | info |
| Oíme negro | | tango | Rosita Quiroga | Rosita Quiroga | | T0370149282 | 2 | 13 | 0 | | info |
| Ojalá fuera cierto | | tango | | - | | Z0999916705 | 0 | 0 | 0 | | info |
| Ojo clínico | | tango | José Seghini | Musci | | Z0999900894 | 1 | 3 | 0 | | info |
| Ojo de agua | | tango | | | | Z0999900986 | 2 | 2 | 0 | | info |
| Ojos brujos | | tango | | | | Z0999900768 | 1 | 1 | 0 | | info |
| Ojos brujos | | tango | | | | Z0999900769 | 1 | 2 | 0 | | info |
| Ojos criollos | | tango | Andrés Domenech | Jesús Fernández Blanco | | T0370149317 | 1 | 1 | 0 | | info |
| Ojos culpables | | tango | | Benjamín Domingo Fernández | | Z0999918048 | 0 | 0 | 0 | | info |
| Ojos lindos y mentirosos | | tango | Tito Schipa | - | | T0050338867 | 1 | 6 | 0 | | info |
| Ojos lindos y mentirosos | | tango | Tito Schipa | | | Z0999919643 | 0 | 0 | 0 | | info |
| Ojos maulas | | tango | Luis Bernstein | Alfredo Faustino Roldán | | T0370021763 | 2 | 19 | 0 | | info |
| Ojos negros | | tango | Vicente Greco | Ernesto Temes | | T0370021796 | 55 | 156 | 0 | C | info |
| Ojos negros que fascinan | | tango | | | | Z0999900157 | 2 | 7 | 0 | | info |
| Ojos que brillan | | tango | Luis Petrucelli | | | Z0999900388 | 1 | 4 | 0 | C | info |
| Ojos que me hacen daño | | tango | | | | Z0999900987 | 2 | 2 | 0 | | info |
| Ojos tristes | Ojos muertos | tango | Rafael Iriarte | Alfredo Navarrine | | T0370021821 | 3 | 15 | 0 | | info |
| Ojos verdes | | tango | Juan Canaro | | | Z0999901747 | 1 | 2 | 0 | | info |
| Ok Mister Tango | Okey Mister Tango | tango | Mariano Mores | Martin Darré | | T0371024611 | 2 | 2 | 0 | | info |
| Olimpia | Olympia | Río de Janeiro | tango | Julio De Caro | Juan Andrés Caruso | 1927 | T0370039147 | 2 | 3 | 0 | A | info |
| Olímpicos | | tango | | | | Z0999900988 | 1 | 4 | 0 | | info |
| Olivero | | tango | José Martínez, Antonio Buglione | | | T0370089692 | 1 | 6 | 0 | | info |
| Olor de malvón | | tango | | | | Z0999919589 | 0 | 0 | 0 | | info |
| Olvida corazón | | tango | Armando Acquarone | Armando Acquarone | | T0373458673 | 1 | 3 | 0 | | info |
| Olvídala | | tango | Agesilao Ferrazzano | | | T0370153200 | 2 | 2 | 0 | | info |
| Olvidala hermano | | tango | | Carlos Lagos | | Z0999917331 | 0 | 0 | 0 | | info |
| Olvidala pa tu bien | | tango | Osvaldo Fresedo | Alberto Pidemunt, Eduardo Salvador Trongé | | T0370149442 | 0 | 0 | 0 | | info |
| Olvídame | | tango | | | | Z0999900770 | 1 | 3 | 0 | | info |
| Olvídame | | tango | Miguel Bucino | Miguel Bucino | | T0370021865 | 5 | 15 | 0 | | info |
| Olvidame para siempre | | tango | | | | Z0999901337 | 1 | 3 | 0 | | info |
| Olvidao | | tango | Guillermo Barbieri | Enrique Cadícamo | 1925 | T0370021876 | 8 | 43 | 0 | C | info |
| Olvidaste | | tango | | | | Z0999900771 | 1 | 3 | 0 | | info |
| Olvidemos todo | | tango | Jorge Valdez, Celso Enrique Amato | Raúl Hormaza | | T0370650342 | 1 | 1 | 0 | | info |
| Olvido | | tango | Ángel D'Agostino | | | Z0999900026 | 1 | 9 | 0 | | info |
| Olvido | | tango | Luis Rubistein | Luis César Amadori | 1936 | Z0000002340 | 5 | 15 | 0 | | info |
| Olvido | | tango | Horacio Pettorossi | | | Z0999900025 | 1 | 4 | 0 | | info |
| Olympia | | tango | Osman Pérez Freire | | | Z0999919609 | 0 | 0 | 0 | | info |
| O Matuto | | tango | | | | Z0000514662 | 1 | 5 | 0 | | info |
| Once y uno | | tango | José Basso | José Basso | | T0370321279 | 1 | 3 | 0 | | info |
| Operate el trigemino | | tango | Manuel Colominas | | | T0374628155 | 1 | 3 | 0 | C | info |
| Opustango | | tango | | - | | Z0999917877 | 0 | 0 | 0 | | info |
| O quereme así o nunca me quieras | | tango | | | | Z0999919019 | 0 | 0 | 0 | | info |
| Oración | | tango | Agustín Magaldi, Pedro Noda | | | T0370039216 | 3 | 4 | 0 | | info |
| Oración | | tango | | | | Z0999900989 | 1 | 4 | 0 | | info |
| Oración | | tango | Rosita Melo | Rosita Melo | | T0373791286 | 0 | 0 | 0 | | info |
| Oración | | tango | Bachicha | Manuel Bertrán Reyna | | T9007599646 | 3 | 6 | 0 | | info |
| Oración | | tango | Samy Friedenthal | | | Z0999917053 | 0 | 0 | 0 | | info |
| Oración criolla | | tango | Alberto Soifer | Manuel Romero | | T0370212240 | 1 | 1 | 0 | | info |
| Oración pampera | | tango | | - | | Z0999916835 | 0 | 0 | 0 | | info |
| Oración postrera | | tango | | | | Z0999919143 | 0 | 0 | 0 | | info |
| Oración rante | | tango | Roberto Chanel | Aldo Queirolo | | Z0000095596 | 13 | 23 | 0 | | info |
| Ordago a la chica | | tango | | | | Z0999918236 | 0 | 0 | 0 | | info |
| Ordenando fracasos | | tango | Carlos Peralta | Alberto Harari | | T0371968852 | 0 | 0 | 0 | | info |
| Ordene mi coronel | | tango | Juan Pardal | | | Z0999919486 | 0 | 0 | 0 | | info |
| Organito | | tango | Juan Carlos Graviz | | | Z0999901107 | 4 | 5 | 0 | | info |
| Organito arrabalero | | tango | José Libertella, Ernesto Baffa | - | | T0371955451 | 1 | 2 | 0 | | info |
| Organito callejero | | tango | | | | Z0002352444 | 1 | 9 | 0 | | info |
| Organito de la tarde | | tango | Cátulo Castillo | José González Castillo (Juan de León) | 1923 | T0370021978 | 63 | 152 | 2 | A | info |
| Organito del suburbio | | tango | Antonio Bonavena | Roberto Torres | | T0370131035 | 4 | 13 | 0 | | info |
| Orgías de amor | | tango | Vicente Salerno | | | Z0999900389 | 1 | 4 | 0 | | info |
| Orgullo criollo | | tango | Pedro Laurenz, Julio De Caro | - | | T0370021989 | 18 | 76 | 1 | | info |
| Orgullosa | | tango | | | | Z0999900159 | 1 | 1 | 0 | | info |
| Orgullosa | | tango | | | | Z0999900158 | 1 | 6 | 0 | | info |
| Orgullo tanguero | | tango | Luis Stazo | Enrique Cadícamo | | T0370469650 | 10 | 15 | 0 | | info |
| Oriente | | tango | Juan Sánchez Gorio | Horacio Sanguinetti | | T0370214359 | 4 | 17 | 0 | | info |
| Origen y destino | | tango | Horacio Omar Valente | Carlos Rossi | | Z0999916496 | 0 | 0 | 0 | | info |
| Orlando Goñi | A Orlando Goñi | tango | Alfredo J. Gobbi | - | | T0370057650 | 31 | 75 | 0 | | info |
| Oro 18 | | tango | Adolfo Pérez | | | Z0999917080 | 0 | 0 | 0 | | info |
| Oro, copa, espada y basto | | tango | Antonio Esteban Tello | Emilio Magaldi | | T0370357199 | 1 | 5 | 0 | | info |
| Oro del cielo | | tango | Antonio Volpe, José Volpe | | | Z0999919093 | 0 | 0 | 0 | | info |
| Oro en tu cabecita | | tango | | | | Z0999919070 | 0 | 0 | 0 | | info |
| Oro falso | | tango | Virgilio Expósito | Homero Expósito | 1944 | T0370242059 | 1 | 10 | 0 | | info |
| Oro muerto | Jirón porteño | tango | Juan Raggi, Julio Plácido Navarrine | Juan Raggi, Julio Plácido Navarrine | 1926 | T0370153222 | 5 | 35 | 0 | | info |
| Oro y diamantes | | tango | Héctor Mauré | David Curotto Costa | | T0370484460 | 2 | 4 | 0 | | info |
| Oro y gris | | tango | Mariano Mores | León Benarós | 1966 | T0370876666 | 4 | 7 | 0 | | info |
| Oro y seda | | tango | Osvaldo Fresedo | Amadeo Canale | | T0370187271 | 4 | 8 | 0 | A | info |
| Orquestas de mi ciudad | | tango | Francisco Fiorentino | Erasmo Silva Cabrera | | T0370206215 | 3 | 19 | 0 | | info |
| Orquesta típica | | tango | Enrique Cadícamo | Enrique Cadícamo | | Z0000059171 | 1 | 7 | 0 | | info |
| Orquídeas a la luz de la luna | Orchids in the moonlight | tango | Vincent Youmans | Gus Kahn | | Z0999900544 | 0 | 0 | 0 | | info |
| Orsi | | tango | | | | Z0999902096 | 1 | 1 | 0 | | info |
| Oscarcito | | tango | Teddy Peiró | Teddy Peiró | | Z0999914134 | 0 | 0 | 0 | | info |
| Ostinato | | tango | Carla Novelli Pugliese | - | | T0373923444 | 1 | 1 | 0 | | info |
| Ostinato tango | | tango | Rodolfo Mederos | - | | T0373077270 | 1 | 1 | 0 | | info |
| Osvaldo | | tango | Domingo Losso, Juan Dima | Luis Casanova | | T0370131115 | 1 | 5 | 0 | | info |
| Osvaldo y Osvaldo | | tango | Daniel Ruggiero | | | T0375490893 | 0 | 0 | 0 | | info |
| Otaria con vos me casé | | tango | José Tinelli, José Rainelli | José de Grassi | | Z0999913338 | 0 | 0 | 0 | | info |
| Otario! | | tango | | | | Z0999901338 | 1 | 1 | 0 | | info |
| Otario que andás penando | Otario que vas penando | tango | Enrique Delfino | Alberto Vacarezza | | T0370022028 | 4 | 16 | 0 | | info |
| Otello | | tango | Arnaldo Barsanti | | | Z0999919662 | 0 | 0 | 0 | | info |
| O terror do mundo | | tango | | | | Z0999919411 | 0 | 0 | 0 | | info |
| Otoñal | | tango | Luis Teisseire | | | Z0999902258 | 1 | 2 | 0 | | info |
| Otoñal | | tango | Jaime Wilensky | - | | T0373590329 | 0 | 0 | 0 | | info |
| Otoño | | tango | | | | Z0999900390 | 1 | 5 | 0 | | info |
| Otoño | | tango | Horacio Pettorossi | Celedonio Flores | | T0370022039 | 3 | 7 | 0 | A | info |
| Otoño porteño | | tango | Astor Piazzolla | - | | T0046988797 | 15 | 22 | 0 | | info |
| Otra copa y se acabó | | tango | | | | T0370075312 | 1 | 2 | 0 | | info |
| Otra luna | | tango | Carlos Libedinsky | - | 2004 | T0373702103 | 2 | 2 | 0 | | info |
| Otra noche | | tango | Rodolfo Sciammarella | Rodolfo Sciammarella | | T0370214371 | 13 | 29 | 0 | | info |
| Otra vez | | tango | Jorge Fernández | José María Contursi | | T0370022040 | 1 | 6 | 0 | | info |
| Otra vez | | tango | | | | Z0999900391 | 1 | 6 | 0 | | info |
| Otra vez carnaval | Noche de carnaval | tango | Carlos Di Sarli | Francisco García Jiménez | 1941 | T0370115324 | 5 | 18 | 0 | | info |
| Otra vez el viejo | | tango | Alfredo E. Gobbi | Alfredo E. Gobbi | 1928 | Z0999901918 | 1 | 2 | 0 | CA | info |
| Otra vez Esthercita | | tango | Armando Pontier | Federico Silva | | T0370960749 | 1 | 4 | 0 | | info |
| Otra vez Gricel | | tango | Joaquín Mora | José María Contursi | | T0370901419 | 0 | 0 | 0 | | info |
| Otro | | tango | Eduardo Rovira | | | T0370444555 | 0 | 0 | 0 | | info |
| Otro | | tango | Daniel Melingo | Daniel Melingo | | T0414760056 | 1 | 1 | 0 | | info |
| Otro ambiente | | tango | | Roberto Emilio Goyeneche | | Z0999918687 | 0 | 0 | 0 | A | info |
| Otro ángel para el cielo | | tango | José Victorio Zanoni | Rubén Ramón Trousel | | T0370398814 | 1 | 2 | 0 | | info |
| Otro año | | tango | José Sala, Nito Farace | José Sala, Nito Farace | | Z0999916113 | 0 | 0 | 0 | | info |
| Otro cambio, los que se fueron | | tango | Litto Nebbia | Litto Nebbia | | T0371249409 | 1 | 1 | 0 | | info |
| Otros tiempos y otros hombres | | tango | Ciriaco Ortiz | Enrique Cadícamo | | T0370245332 | 2 | 13 | 0 | | info |
| Otro tango | | tango | | | | Z0999915402 | 0 | 0 | 0 | | info |
| Otro tiempo | | tango | Javier Leone | | | Z0001276936 | 0 | 0 | 0 | | info |
| Otro trago | | tango | Rafael Iriarte | - | | Z0999902259 | 1 | 1 | 0 | | info |
| Oxidada | | tango | | Héctor Negro | | Z0001112120 | 0 | 0 | 0 | | info |
| Oye las campanas | | tango | Enrique De Lorenzo | Orlando Salatini | | Z0999917981 | 0 | 0 | 0 | | info |
| Oyeme | | tango | Enrique Francini | Homero Expósito | 1947 | T0370256964 | 2 | 8 | 0 | | info |
| Oyeme mamá! | | tango | Armando Baliotti | Julio Jorge Nelson | | T0370290086 | 4 | 8 | 0 | | info |
| Oyeme mujer | | tango | | | | Z0000541156 | 1 | 3 | 0 | | info |
