Rutherglen Library in South Lanarkshire will be open between 11am and 2pm on December 25, with staff planning a festive film screening.
It is the second year the library has opened up on Christmas Day, with Culture Secretary Fiona Hyslop hailing the initiative.
She said: "Rutherglen Library fulfils a need in the community, and this does not go away during the festive period. I commend staff who are willing to take time out of their holiday to make this Christmas a happy one for others."
Ms Hyslop added: "Libraries are at the heart of our communities, welcoming people in and serving a wider social purpose. The Scottish Government places great importance on them to empower, to tackle inequality, and to reduce isolation."
John Ross, leader of South Lanarkshire Council, said: "I have to pay tremendous credit to the staff, who give up their own time to ensure people are not isolated over the Christmas period.
"This will be the second time they have opened on Christmas Day, and I know last year more than 40 people visited.
"Everyone is welcome, you don't need to let anyone know your reason for coming along other than to share a community experience with other people on a day which can be very lonely for some individuals."