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) (born 1946), Irish historian and biographer
- Peter Costello (footballer) (born 1969), English footballer
This disambiguation page lists articles about people with the same name.
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