Ulf is a common first name in Europe, especially in Scandinavia. ULF can refer to: Ultra Large Format, used for cameras producing negatives larger than 8" x 10" Ultra Low Floor, is a type of tram Ultra low frequency, the radio frequency band from 300 Hz to 3 kHz United Labour Front, a defunct political party in Trinidad and Tobago Upplands lantarbetareförbund (Farm Workers Union of Uppland), a Swedish farm workers union