List of number-one singles of 2009 (Finland)

The list of number-one singles of 2009 in Finland details the songs that reached the top position on the Official Finnish Singles Chart, also known as the Suomen virallinen lista, during the year 2009. This chart, compiled by Musiikkituottajat – IFPI Finland, tracks the sales and streams of singles within Finland. The list typically includes the date the song reached number one, the artist(s) performing the song, and the title of the song. This information provides a snapshot of the most popular music in Finland during that year, reflecting the tastes and trends within the Finnish music market. The list is updated weekly.