I15 may refer to:
- Interstate 15, a north–south Interstate Highway in the United States of America
- Polikarpov I-15, a Soviet fighter aircraft
- I15 (band), a band
- Japanese submarine I-15, of the Imperial Japanese Navy
- Älvsborg Regiment (I 15) a former Swedish Army infantry regiment
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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