| Birthday | |
| Cover: | Birthday_Taproot.jpg |
| Type: | single |
| Artist: | Taproot |
| Album: | Blue-Sky Research |
| Released: | 2005 |
| Genre: |
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| Length: | 4:29 |
| Label: | |
| Producer: | Toby Wright |
| Prev Title: | Calling |
| Prev Year: | 2005 |
| Next Title: | Wherever I Stand |
| Next Year: | 2008 |
Birthday is the second and final single from Taproot's third album, Blue-Sky Research. The song is the band's last to be released through Atlantic Records following poor album sales. "Birthday" was co-written by music producer Bob Marlette.
The radio edit of the song omits the heavy section of the bridge and the screamed vocals.