KLB is a rock group/boy band from Brazil.
KLB may also refer to: KLB (2000 album), their debut album Kalabo Airport, Zambia Kenya Literature Bureau, a Kenyan publisher Kiliwa language Kinlochbervie Camanachd Club, a Scottish shinty club Kiraoli railway station, Agra district, Uttar Pradesh, India KLB Club, a name adopted by Allied airmen at Buchenwald concentration camp Klebsazolicin, a peptide antibiotic β-klotho, encoded by the KLB gene