B100

B100 may refer to:

Radio stations

 * KBEA-FM (99.7 FM, "B100"), a radio station in Muscatine, Iowa, U.S.
 * WBYT (100.7 FM. "B100"), a radio station in South Bend, Indiana, U.S.
 * KFMB-FM (100.7 FM, "B-100"), a radio station in San Diego, California, U.S., now known as KFBG
 * CKBZ-FM (100.3 FM, "B-100"), a radio station in Kamloops, British Columbia, Canada

Others

 * B100 (New York City bus)
 * Great Ocean Road (route number B100), Victoria, Australia
 * An abbreviation for 100% biodiesel
 * 100 amp, type B – a standard circuit breaker current rating