In botany:

• African Blackwood, tree native to seasonally dry regions of Africa
• Australian Blackwood, Acacia species native in eastern Australia
• Acacia argyrodendron, Acacia species native in eastern Australia

In places:

• Blackwood, Victoria, Australia
• Blackwood, New Jersey, USA
• Blackwood, North Carolina, USA
• Blackwood, Caerphilly, Wales, United Kingdom
• Blackwood, Dumfries and Galloway, Scotland, United Kingdom
• Blackwood, South Lanarkshire, Scotland, United Kingdom
• Blackwood, South Australia, suburb of Adelaide, Australia
• Blackwood, County Kildare, also known as Coill Dubh, Ireland

In fiction:

• Blackwood, fictional empire central to Charlie Martin's novel Shadowslayers
• Blackwood, fictional racing circuit in the racing simulator Live for Speed

In other uses:

• Blackwood convention, in Contract Bridge
• Blackwood Golf Club, golf course in South Australia
• Blackwood's Magazine, 19th century British periodical
• Blackwood River, in Western Australia
• Lincoln Blackwood, American luxury pickup truck manufactured by Lincoln
• British Maritime
• HMS Blackwood, Royal Navy warship, named after Captain Henry Blackwood
• Blackwood class frigate, class of ship in the Royal Navy, also named after Captain Henry Blackwood