Half-cocked may refer to:

• half-cock, the position the hammer of a firearm that is partially cocked
• Halfcocked, a hard rock band
• Half-Cocked (film), a 1994 film

• Newcastle Rebels
• Newcastle RGS
• Newcastle Royal Grammar School
• Newcastle, Shropshire
• Newcastle, South Africa
• Newcastle, Texas
• Newcastle Thunder
• New Castle Township, PA
• New Castle Township, Schuylkill County, Pennsylvania
• New-Castle Turnpike
• New Castle Turnpike
• New-Castle Turnpike and Railroad
• New Castle Turnpike and Rail Road
• New-Castle Turnpike and Rail Road
• New Castle Turnpike and Railroad
• New-Castle Turnpike and Rail Road Company
• New Castle Turnpike and Rail Road Company
• New Castle Turnpike and Railroad Company
• New-Castle Turnpike and Railroad Company
• New Castle Turnpike Company
• New-Castle Turnpike Company
• Newcastle, TX
• Newcastle-under-Lyme
• Newcastle-Under-Lyme
• Newcastle-under-Lyme Canal