"Active class" may refer to:
, a class of eight fifth-rate frigates operated by the British Royal Navy from 1780 to 1830 Active-class schooner, a class of six schooners operated by the United States Revenue Cutter Service from 1867 to 1874 , a class of three scout cruisers operated by the British Royal Navy from 1911 to 1920 , a class of 32 patrol boats operated by the United States Coast Guard from 1927 to 1978