Pig iron can refer to:

• Pig iron, an intermediate form of iron produced from iron ore and is subsequently worked into steel or wrought iron
• Pig Iron - The Album by Anti-Nowhere League
• Pig Iron Theatre Company, a theater group located in Philadelphia, PA
• Robert Menzies, an Australian Prime Minister in the 1930s who was known, disparagingly, as "Pig Iron Bob"
• Peter Porkchops, a character from the DC Comics series Captain Carrot and His Amazing Zoo Crew, also known as Pig Iron

• Kildimo
• Kildimo-Pallaskenry GAA
• Kildin (disambiguation)
• Kildin Island
• Kildin Sami
• Kildin Strait
• Kildinstroy
• Kil (disambiguation)
• Kildonald Bay
• Kildonan (disambiguation)
• Kildonan, Highland
• Kildonan North Stars
• Kildonan Place
• Kildonan, Skye
• Kildonan-St. Paul
• Kildonan--St. Paul
• Kildonan--Transcona
• Kildonan--Transcona (Manitoba riding)
• Kildonan, Zimbabwe
• Kildonan–St. Paul
• Kildonian--Transcona (Manitoba riding)
• Kildorrery GAA
• Kildress
• Kildrummy
• Kildwick and Cross Hills rail crash