Mr Salmond's administration has already put forward legislation to allow 16 and 17-year-olds to take part in the crucial vote.
The question to be put to voters is almost certain to be: Should Scotland be an independent country? Yes/No.
The wording was changed after elections watchdog the Electoral Commission said use of the phrase "do you agree" in the original proposed question was biased towards a Yes vote.
Before the announcement Ms Sturgeon will visit engineering apprentices who will play an "integral part" in the events by welding the referendum date onto a piece of metal. She will be at Steel Engineering in Westway Park, Renfrewshire, a steel fabricator business which is developing the world's first community-owned tidal turbine and also making the world's largest wind turbine.
She said: "Today we will unveil the date for the 2014 referendum which marks a significant and important step in Scotland's independence journey... In an independent Scotland, it will be this Government's utmost priority to create a system that will encourage young people into work environments like these, allowing them to play a full, active role in our society."