The New Cumberland Library is located in the historic Benjamin House located at 1 Benjamin Plaza, New Cumberland. This building is one of the oldest and most historic properties in the community.

The house was built in 1819 by Jacob and Elizabeth Shelly. At the time, New Cumberland was just getting started a half mile away. Originally part of the Peter Chartier Tract the property went through several owners before coming into the hands of the Shelly Family. Measuring 35 by 45 feet, the original building is a fine example of early 19th Century German craftmanship. The home was deeded to the borough of New Cumberland in 1968 by Mr. and Mrs. Rowland Benjamin to be used as a public library. With the addition added on in 1976, the mansion was dedicated on July 4 as the New Cumberland Public Library. The original house serves as the Library Museum and community rooms. An Art Gallery on the second floor displays the works of a different local artist each month.

In 2001-2002, a 6,600 square foot expansion project to both the North and South wings of the 1976 addition was completed. The $1,100,000 project was funded with a state grant, memorials, and local donations. Memorial and Honor bricks are still available for lining the sidewalks of the 2 1/2 acre library park. They may be purchased at the library. New areas added tripled the Children's Room space on the lower level, provide a new Teen area on the main floor, a new audio-visual area, and expanded space for the non-fiction and fiction book collections.