Gustav Lærum was a Norwegian satirical illustrator, caricaturist and sculptor.

He provided illustrations for the satirical magazines Korsaren, Tyrihans, and Vikingen, and also the newspaper Verdens Gang. Selected illustrations were published in Fra Uret til Grand, Norske Politici (1895), and Skyggebilder (1912). His sculptures include statues or busts of Prime Ministers Johan Sverdrup, Jørgen Løvland, and Gunnar Knudsen.