In the United States, "Accidentally in Love" topped the "Billboard" Adult Alternative Songs chart for five weeks in July and August 2004. On the "Billboard" Hot 100, it debuted at number 61 on June 26, 2004, rising to its peak of number 39 eight weeks later (on August 21) and spending 20 weeks on the chart. It also appeared on several other "Billboard" rankings, reaching number three on the Adult Top 40, number 23 on the Adult Contemporary chart, and number 35 on the Mainstream Top 40. The Recording Industry Association of America awarded the song a gold disc in January 2005 for shipping over 500,000 units.