Cudahy is an Irish surname, related to the name "Cuddihy" and is native to Counties Cork and Tipperary. The Irish form of this name would be written as Ó Cuidighthigh (male) or Ní Chuidighthigh (female). It may refer to:
Surname
Edward Cudahy Jr. (1885–1966), American kidnapping victim; M. Cudahy's nephew
John Cudahy (1887–1943), American real estate developer and diplomat