"All the Small Things" is a song by the American rock band Blink-182. It was the second single released from the band's third album Enema of the State (1999). The track was composed primarily by guitarist and vocalist Tom DeLonge as an ode to his then girlfriend. Recorded in Los Angeles with producer Jerry Finn, the song was created with the intention of shipping it to radio, as the trio felt they needed a single "really catchy and basic."

The single was released in early 2000 and promptly charted worldwide, becoming a number one hit on Billboard's Modern Rock Tracks chart, peaking at number two on the UK Singles Chart, and crossing over to pop radio and peaking at number six on the Billboard Hot 100. The song remains the band's most successful single to date. The song charted within the top 20 in ten other countries, and gained greater significance due to its accompanying music video, which parodies and mocks the boy bands Backstreet Boys and 'N Sync. The video was popular in rotation on MTV's Total Request Live, leading to criticism from those who felt their basis for parody was thin.

"All the Small Things" was selected by Rolling Stone as one of the "100 Greatest Pop Songs", and is listed in the 2010 book 1001 Songs You Must Hear Before You Die.