Taxus Baccata

343 may refer to:

• 343, a year of the Christian or Common Era
• 343 BC, the year
• 343 (number), the integer represented by the English-language numeral "three hundred and forty-three"

Vehicles

• Three Forty Three, a New York City fireboat
• Volvo 343, a small family car
• Fiat 343, a bus

Other uses

• 343 Guilty Spark, a fictional character from the Halo franchise
• 343 Industries, a Microsoft video game studio responsible for the Halo franchise, named after this character
• Area code 343, a phone number area code for Ottawa, Ontario, Canada
• Highway 343, a list of highways numbered 343
• 343, a group of women behind the Manifesto of the 343
• Asteroid 343, see 343 Ostara