Loud Hailer may refer to:

• Megaphone
• Loud Hailer (album)

• List of New Zealand super middleweight boxing champions
• List of New Zealand super welterweight boxing champions
• List of New Zealand Twenty20 International cricket records
• List of New Zealand urban areas
• List of New Zealand welterweight boxing champions
• List of New Zealand women artists
• List of New Zealand women ODI cricketers
• List of New Zealand women photographers
• List of New Zealand Women's One Day International cricket records
• List of New Zealand women Twenty20 International cricketers
• List of New Zealand women writers
• List of Nexo Knights characters
• List of Nexo Knights episodes
• List of next generation display technologies
• List of NFL 1,000-yard receiving trios
• List of NFL annual passer rating leaders
• List of NFL annual receiving touchdowns leaders
• List of NFL annual receiving yards leaders
• List of NFL annual receptions leaders
• List of NFL annual rushing touchdowns leaders
• List of NFL annual rushing yards leaders
• List of NFL career passing yards leaders
• List of NFL career receiving yards leaders
• List of NFL career rushing leaders
• List of NFL champions (1920-69)