On the first floor are located the parlor, the library, two dining rooms, and the kitchen. One of the dining rooms is located in the western wing, off of the hallway, and was used primarily used by the family for smaller meals like breakfast or tea. The kitchen is also in the wing, directly adjacent to the dining room. The other dining room, located in the front western side of the main house, was used only for formal dinners and as the sitting room where the men would converse after dinner. The fireplace in the room was enclosed in marble when Buchanan bought Wheatland and had a furnace installed. Across the hall, on the other side of the main house is the parlor, where the women guests would congregate after dinner. The library is located off the hallway in the east wing. The woodwork, doors, a bookcase, and a bookshelf built into the wall were grained to resemble oak. The shelves in the bookshelf no longer exist; but, the backboard of the bookshelf is visible, as is the plaster wall made to resemble wood. Two mahogany bookcases, flanking the fireplace in the library, were furnished by Jenkins and having been sold to each successive owner by the previous one. The library was primarily used by Buchanan as the place to meet with guests.