Peter Costello (disambiguation)
# Peter Costello (disambiguation)

Peter Costello (born 1957) is a former politician who served as Australian Treasurer from 1996 to 2007.

Peter Costello may also refer to:

* Peter E. Costello (1854–1935), American politician
* Peter Costello (author), Irish historian and biographer
* Peter Costello (footballer) (born 1969), English footballer
