List of number-one singles of 2020 (Australia)

The Australian Recording Industry Association (ARIA) publishes a weekly chart that ranks the best-performing singles in Australia. This list details the singles that reached the number-one position on the ARIA Singles Chart during the year 2020. It includes information such as the artist(s) who performed the song, the song title, and the date the song reached number one. The listing provides a chronological overview of the year's most popular songs based on sales and streaming data compiled by ARIA. It represents a snapshot of popular music trends within Australia during that specific year. Each entry typically includes the date the song reached the top of the chart and the number of weeks it remained at number one. Occasionally, details of certifications (e.g., platinum, gold) awarded by ARIA are included.