Cheng Yu (, 141–220) was an advisor to the warlord Cao Cao during the late Han dynasty.
Cheng Yu or Chengyu may also refer to:
Chengyu (成語), a type of idiomatic expression in the Chinese language Chengdu-Chongqing dialect or Cheng-Yu dialect Cheng Yu (musician) (), Chinese pipa player based in England Cheng Yu (table tennis) (, born 1952), Chinese para table tennis player Winnie Yu (; born 1954), Hong Kong radio personality
See also Zheng Yu (born 1996), Chinese badminton player