Surly may refer to:

• Surly Squirrel, a cartoon character created by Peter Lepeniotis and from The Nut Job, and its sequel The Nut Job 2: Nutty by Nature
• Surly Bob, a 19th-century English children's novel by Luisa C. Silke
• Surly, a fairy from Ni no Kuni
• Surly the sarcosuchus from Dino Time
• Surly, a surfer punk from the 1987 movie, Back to the Beach

• Surly Bikes, a Bloomington-based brand in the U.S. state of Minnesota
• Surly Brewing Company, a beer producer and distributor in the U.S. state of Minnesota
• Surly Bob's, a former sports bar in Yellowknife, Northwest Territories, Canada

• HMS Surly, four ships of the British Royal Navy