The Karoo long-billed lark (Certhilauda subcoronata) or Karoo longbill is a species of lark in the family Alaudidae. It is found in southern Africa in its natural habitat of subtropical or tropical dry shrubland.

Previously, the Karoo long-billed lark was considered by some authorities to comprise several subspecies of the Cape long-billed lark.

Six subspecies are recognised:

Subspecies C. s. benguelensis together with C. s. kaokoensis, have sometimes been treated as a separate species, the Benguela long-billed lark. The two taxa are considered to be subspecies of the Karoo long-billed lark based on the similar vocalization and the uncertain affinities of the intermediate taxon damarensis.