The Union of Bulgarian National Legions (UBNL), until 1935 the Union of the National Youth Legions (UNYL); Съюз на Младежките Национални Легиони (СМНЛ); Sayuz na Mladezhkite Natsionalni Legioni (SMNL), was an ultranationalist, monarchist, and right extremist organization in Bulgaria, which was active between 1932 and 1944.