Haymarket Square may refer to:

• Haymarket Square (Boston), in Boston

• Haymarket Square (Chicago), in Chicago
• Haymarket affair, a labor demonstration in Chicago at Haymarket Square in 1886

• Haymarket Square (band), a Chicago-based psychedelic rock band

• The Pilgrim of Hate
• The Pilgrims First Thanksgiving
• The Pilgrim (Shaun Davey album)
• The pilgrims progress
• The Pill
• The Pillars of the Earth (miniseries)
• The Pillory (magazine)
• The Pillowcase
• The Pillow Head Hour
• The Pill (song)
• The Pill Versus the Springhill Mine Disaster
• The Pill versus the Springhill Mine Disaster
• The Pilo Family Circus
• The Pilot (Canadian newspaper)
• The Pilot (disambiguation)
• The Pilot (film)
• The Pilot (newspaper)
• The Pilot, Part 1
• The Pilot (Seinfeld episode)
• The Pilot Show
• The Pilot (Supernatural)
• The Pilot (Two Guys and a Girl)
• The Pilot (Two Guys and a Girl Episode)
• The Pilot (Will & Grace)
• The Piltdown Man