B100 may refer to:
Radio stations KBEA-FM (99.7 FM, "B100"), a radio station in Muscatine, Iowa, US WBYT (100.7 FM. "B100"), a radio station in South Bend, Indiana, US KFMB-FM (100.7 FM, "B-100"), a radio station in San Diego, California, US, now known as KFBG CKBZ-FM (100.3 FM, "B-100"), a radio station in Kamloops, British Columbia, Canada WKXB (99.9 FM, "B-100"), a radio station in Wilmington, North Carolina, US, formerly known as WVBS-FM WOBB (100.3 FM, "B-100"), a radio station in Tifton, Georgia, US
Technology Nvidia B100, a GPU B100, a 100% biodiesel 100 amp, type B, a standard circuit breaker current rating
Transportation B100 road (Great Britain) B100 (New York City bus), US Great Ocean Road (route number B100), Victoria, Australia