Whalley Library is set to reopen early next year.
A total of 26 libraries across the region, including Whalley Library, were closed last year as part of cost-cutting measures by the council.
The Conservatives, who gained control in May, then announced that nine of them would open again.
They are Barrowford, Bolton-le-Sands, Burnley Campus, Freckleton, Fulwood, Lostock Hall, Oswaldtwistle, Silverdale and Whalley.
A spokesman for Lancashire County Council said: “Whalley Library will be reopened early next year and we’re currently working to finalise a date.”
Earlier this year, county Coun. Peter Buckley, cabinet member for community and cultural services, stressed the importance of local libraries. He said: “Libraries are a vital service at the heart of our communities, offering free access to books and information. That is why we’re proposing to reopen libraries which were closed, as well as safeguarding full library services at six libraries which had been due to close. A significant amount of activity will be needed to reopen the libraries. This will include building assessments and carrying out work to improve the condition of some buildings, recruiting and training staff, reconnecting ICT and other infrastructure.”