CFB

CFB may refer to:
 * College football
 * Canadian Forces base, military installation of the Canadian forces
 * Caminho de Ferro de Benguela, railway in Angola
 * Carrollton-Farmers Branch Independent School District
 * Cipher feedback, a block cipher mode in data encryption
 * Clube de Futebol «Os Belenenses», a football club in Portugal
 * Continental flood basalt, large volumes of dominantly tholeiitic basalt on continents
 * Complement factor B, a protein
 * Compact fluorescent bulb
 * Current feedback, a type of electronic feedback used in some operational amplifiers
 * Circulating fluidized bed, a type of fluidized bed used in power plants
 * Commission fédérale des banques (Swiss Federal Banking Commission)
 * CFB, the IATA code for Cabo Frio International Airport
 * CFB, the National Rail station code for Catford Bridge railway station
 * CFB is acronym for Call Forwarding when Busy telecom service
 * Circulating fluidized bed combustion
 * Cfb, one of four symbols for the Oceanic climate under the Köppen climate classification system
 * Cytophaga-Flavobacteria-Bacteroides group, a previous name for the current Bacteroidota phylum
 * Change From Baseline, a tool used in clinical trials to measure the safety and efficacy of therapeutic interventions
 * Swedish Central Federation for Voluntary Military Training