List of number-one hits of 1966 (Argentina)
This is a list of the songs that reached number one in Argentina in 1966, according to Billboard magazine with data provided by Rubén Machado's "Escalera a la fama".
| Issue date | Song | Artist |
| January 1 | "Changuito Dios" | Palito Ortega |
| January 8 | "Changuito Dios" | Palito Ortega |
| January 15 | "Changuito Dios" | Palito Ortega |
| January 22 | "Avec" | Charles Aznavour/Franck Pourcel/ Lucio Milena/Elio Roca |
| January 29 | "Avec" | Charles Aznavour/Franck Pourcel/ Lucio Milena/Elio Roca |
| February 5 | "Avec" | Charles Aznavour/Franck Pourcel/ Lucio Milena/Elio Roca |
| February 12 | "Avec" | Charles Aznavour/Franck Pourcel/ Lucio Milena/Elio Roca |
| February 19 | "Avec" | Charles Aznavour/Franck Pourcel/ Lucio Milena/Elio Roca |
| February 26 | "Avec" | Charles Aznavour/Franck Pourcel/ Lucio Milena/Elio Roca |
| March 5 | "La playa" | Claude Ciari/Aldo Perricone/Nancy Li/ Lucio Milena/Dany Montano |
| March 12 | "La playa" | Claude Ciari/Aldo Perricone/Nancy Li/ Lucio Milena/Dany Montano |
| March 19 | "El corralero" | El Chango Nieto/Los Cantores de Quilla Huasi/Ginette Acevedo/ Hernán Figueroa Reyes/Los Trovadores del Norte |
| March 26 | "El corralero" | El Chango Nieto/Los Cantores de Quilla Huasi/Ginette Acevedo/ Hernán Figueroa Reyes/Los Trovadores del Norte |
| April 16 | "Michelle" | Billy Vaughn/Bárbara & Dick with Los Iracundos/ Los Shakers/Los Vip's/The Beatles |
| April 23 | "Michelle" | Billy Vaughn/Bárbara & Dick with Los Iracundos/ Los Shakers/Los Vip's/The Beatles |
| April 30 | "Michelle" | Billy Vaughn/Bárbara & Dick with Los Iracundos/ Los Shakers/Los Vip's/The Beatles |
| May 7 | "Michelle" | Billy Vaughn/Bárbara & Dick with Los Iracundos/ Los Shakers/Los Vip's/The Beatles |
| May 14 | "Michelle" | Billy Vaughn/Bárbara & Dick with Los Iracundos/Los Shakers/Los Vip's/ The Beatles/Vincent Morocco/Mr. Trombone/Gino Bonetti |
| May 21 | "Ninguno me puede juzgar " | Caterina Caselli/Gene Pitney/Violeta Rivas/ Elio Roca/Aldo Perricone |
| May 28 | "Ninguno me puede juzgar " | Caterina Caselli/Gene Pitney/Violeta Rivas/ Elio Roca/Aldo Perricone |
| June 4 | "Ninguno me puede juzgar " | Caterina Caselli/Gene Pitney/Violeta Rivas/ Elio Roca/Aldo Perricone |
| June 18 | "Manuel Benítez El cordobés" | Dalida/Franck Pourcel/Pierre Selin/ Richard Davis/Los Nocturnos |
| June 25 | "Manuel Benítez El cordobés" | Dalida/Franck Pourcel/Pierre Selin/ Richard Davis/Los Nocturnos |
| July 2 | "Girl" | The Beatles/Los Inn/ Los Vip's/Peppino di Capri |
| July 9 | "Girl" | The Beatles/Los Inn/ Los Vip's/Peppino di Capri |
| July 16 | "Girl" | The Beatles/Los Inn/ Los Vip's/Peppino di Capri |
| July 23 | "Juanita Banana" | The Peels/Juan Montego/Míster Trombón/ Los Hills/J.R. Corvington/Tony Scott |
| August 6 | "Juanita Banana" | The Peels/Juan Montego/Míster Trombón/ Los Hills/J.R. Corvington/Tony Scott |
| August 13 | "These Boots Are Made For Walkin'" | Nancy Sinatra/Los Inn/Cinty Li |
| August 20 | "These Boots Are Made For Walkin'" | Nancy Sinatra/Los Inn/Cinty Li |
| August 27 | "These Boots Are Made For Walkin'" | Nancy Sinatra/Los Inn/Cinty Li |
| September 3 | "These Boots Are Made For Walkin'" | Nancy Sinatra/Los Inn/Cinty Li |
| September 10 | "Monday, Monday" | The Mamas & the Papas |
| September 24 | "Monday, Monday" | The Mamas & the Papas |
| October 15 | "Strangers in the Night" | Frank Sinatra/Bert Kaempfert/Hugo Santana Sergio Más/The Living Brass/Dalida |
| October 22 | "Guantanamera" | Pete Seeger/Bárbara y Dick with Los Iracundos/ Luis Bravo/Mr. Trombone |
| October 29 | "Strangers in the Night" | Frank Sinatra/Bert Kaempfert/Hugo Santana Sergio Más/The Living Brass/Dalida |
| November 5 | "Lara's Theme" | Al Korvin/Ray Conniff/Roger Williams The Brass Ring/Cuerdas Cantantes/Michel Monot |
| November 12 | "Lara's Theme" | Al Korvin/Ray Conniff/Roger Williams The Brass Ring/Cuerdas Cantantes/Michel Monot |
| November 26 | "Yellow Submarine" | The Beatles |
| December 3 | "Yellow Submarine" | The Beatles |
| December 17 | "A Man and a Woman" | Eddie Barclay/Franck Pourcel |
| December 24 | "A Man and a Woman" | Eddie Barclay/Franck Pourcel |
| December 31 | "A Man and a Woman" | Eddie Barclay/Franck Pourcel |