Skegness Library will be open for five additional hours each week from Monday (June 1).
Opening hours have been revised at a number of libraries across the county including Gainsborough, Louth, Sleaford and Spalding.
County libraries and heritage manager, Jonathan Platt, said: “The changes are based on public feedback and analysis of when these libraries are being used.
“Hopefully, the new opening times will make it easier for customers in these areas to use our services at a time that is convenient to them.”
Further details on Lincolnshire’s library services can be found at www.lincolnshire.gov.uk/libraries .