List of number-one singles of 2018 (Spain)

This article documents the songs that reached the number-one position on the Spanish singles chart in 2018, as compiled by Productores de Música de España (Promusicae). The chart ranks songs based on a weighted formula of sales and streaming activity. Each week, Promusicae publishes the official list of top singles in Spain. This list details the artists and songs that held the top spot throughout the year, providing a historical record of popular music consumption in Spain during 2018. The information includes the song title, artist(s), and the week in which the song reached number one.