Founded in 1921 as a women's college by the Sisters of the Holy Child Jesus, the undergraduate program opened to male students beginning in fall 2009.

The School Professional Studies is designed for working adults and offers online programs at both the undergraduate and graduate level.

[15] Built in the iconic University Gothic Style of architecture, the sprawling 58-acre campus is located in an area known as the Main Line outside of Philadelphia in the historic residential neighborhood of Rosemont, Pennsylvania.

[16] In 2006, the historic Connelly Hall was modernized and expanded to 30,000 square feet[17] and was re-opened in August 2022 after a $7.5 million restoration project.

After the Society of the Holy Child Jesus acquired the land that would become Rosemont College, the stables were repurposed in 1921 to house a science lab, an art studio, and an auditorium.

To meet this demand, a plan was devised to retain the back portion and foundation of the stables, adding a new front and upper floors.

In 1927, the Sisters of the Holy Child of Jesus acquired the former summer home of Joseph F. Sinnott for $1.00 to serve as the school campus.

[26] Unlike other local Catholic colleges, Rosemont's campus eschewed cloistered buildings and convent motifs in favor of a campus with "modestly-sized buildings arranged around a gentle rise in the landscape.... Students found it easy to walk to the Rosemont train station or to the shops in nearby Bryn Mawr, which was very different from the relative isolation encountered by students at Chestnut Hill and especially at Immaculata.

Originally built in 1953, the recent renovation included upgrades to the mechanical and electrical systems, as well as a full modernization of the space.

[27] In 2019, Kimmel Bogrette completed the design and planning for a major renovation and expansion of Rosemont College's Cardinal Hall.

The new 75,000 square-foot facility, with a total cost of $11 million, features an expansive indoor campus commons that serves as a central gathering space for students, faculty, staff, and visitors.

[29] Founded in 1921 by the Society of the Holy Child Jesus, Rosemont College is an independent university in the Catholic tradition located on the Philadelphia Main Line in Southeastern Pennsylvania.

[26] However, Rosemont evolved over the course of the twentieth century; "As views on women changed, the original—what some would call convent—atmosphere gradually moved toward more freedom for students to come and go, later curfews, and greater interaction with college men.

"[26] In 1957, United States Senator (35th U.S. President) visits Rosemont and speaks to students and faculty in Main Building, Rathalla.