List of number-one Billboard Hot Latin Tracks of 1990
This is a list containing the Billboard Hot Latin Tracks number-ones of 1990.
| Issue date | Song | Artist | Ref. |
| January 6 | "La Chica de Humo" | Emmanuel | |
| January 13 | "Cómo Fuí a Enamorarme de Tí" | Los Bukis | |
| January 20 | "Cómo Fuí a Enamorarme de Tí" | Los Bukis | |
| January 27 | "La Cima del Cielo" | Ricardo Montaner | |
| February 3 | "La Cima del Cielo" | Ricardo Montaner | |
| February 10 | "Lambada" | Kaoma | |
| February 17 | "Lambada" | Kaoma | |
| February 24 | "Lambada" | Kaoma | |
| March 3 | "Lambada" | Kaoma | |
| March 10 | "Lambada" | Kaoma | |
| March 17 | "Lambada" | Kaoma | |
| March 24 | "Lambada" | Kaoma | |
| March 31 | "Abre las Ventanas al Amor" | Roberto Carlos | |
| April 7 | "Abre las Ventanas al Amor" | Roberto Carlos | |
| April 14 | "Abre las Ventanas al Amor" | Roberto Carlos | |
| April 21 | "Volaré" | Gipsy Kings | |
| April 28 | "Volaré" | Gipsy Kings | |
| May 5 | "Quién Como Tú" | Ana Gabriel | |
| May 12 | "Quién Como Tú" | Ana Gabriel | |
| May 19 | "Quién Como Tú" | Ana Gabriel | |
| May 26 | "Quién Como Tú" | Ana Gabriel | |
| June 2 | "Quién Como Tú" | Ana Gabriel | |
| June 9 | "Quién Como Tú" | Ana Gabriel | |
| June 16 | "Quién Como Tú" | Ana Gabriel | |
| June 23 | "El Cariño Es Como Una Flor" | Rudy La Scala | |
| June 30 | "El Cariño Es Como Una Flor" | Rudy La Scala | |
| July 7 | "El Cariño Es Como Una Flor" | Rudy La Scala | |
| July 14 | "El Cariño Es Como Una Flor" | Rudy La Scala | |
| July 21 | "Tengo Todo Excepto a Tí" | Luis Miguel | |
| July 28 | "Tengo Todo Excepto a Tí" | Luis Miguel | |
| August 4 | "Tengo Todo Excepto a Tí" | Luis Miguel | |
| August 11 | "Tengo Todo Excepto a Tí" | Luis Miguel | |
| August 18 | "Tengo Todo Excepto a Tí" | Luis Miguel | |
| August 25 | "Tengo Todo Excepto a Tí" | Luis Miguel | |
| September 1 | "Tengo Todo Excepto a Tí" | Luis Miguel | |
| September 8 | "Tengo Todo Excepto a Tí" | Luis Miguel | |
| September 15 | "¿Por Qué Te Tengo Que Olvidar?" | José Feliciano | |
| September 22 | "¿Por Qué Te Tengo Que Olvidar?" | José Feliciano | |
| September 29 | "Amnesia" | José José | |
| October 6 | "Peligroso Amor" | Myriam Hernández | |
| October 13 | "Peligroso Amor" | Myriam Hernández | |
| October 20 | "Completamente Enamorados" | Chayanne | |
| October 27 | "Completamente Enamorados" | Chayanne | |
| November 3 | "Completamente Enamorados" | Chayanne | |
| November 10 | "Completamente Enamorados" | Chayanne | |
| November 17 | "Completamente Enamorados" | Chayanne | |
| November 24 | "Entrégate" | Luis Miguel | |
| December 1 | "Abrázame Fuerte" | Lourdes Robles | |
| December 8 | "Es Demasiado Tarde" | Ana Gabriel | |
| December 15 | "Es Demasiado Tarde" | Ana Gabriel | |
| December 22 | "Es Demasiado Tarde" | Ana Gabriel | |
| December 29 | "Es Demasiado Tarde" | Ana Gabriel |