Peter Walsh is the name of:

• Peter Valesius Walsh (1618-1688), Irish politician and controversialist
• Peter Walsh (Australian politician) (born 1935), former Australian Senator and Finance Minister
• Peter Walsh (Victorian politician) (born 1954), Victorian state politician
• Peter Walsh (organizer) (born 1956), professional organizer hosting television programs such as Clean Sweep and Enough Already
• Peter Walsh (sports broadcaster), Australian sports commentator
• Peter Walsh (footballer) (born 1976), Australian rules footballer with Port Adelaide and Melbourne
• Peter Walsh (priest), Irish priest and author
• Peter Walsh (producer) (born 1950), British music producer
• A character in Virginia Woolf's Mrs Dalloway

[ Source: Wikipedia ]