I11

I11 or I-11 may refer to:
 * AISA I-11, a two-seat civil utility aircraft
 * Interstate 11, a highway in the United States
 * Japanese submarine I-11, a Type A1 submarine of the Japanese Imperial Navy
 * Kronoberg Regiment, a Swedish Army infantry regiment designated as I 11 and I 11/Fo 16
 * NMBS/SNCB I11 coach, a type of Belgian passenger rail vehicle
 * VEF I-11, a Latvian light aircraft