First Presbyterian Church, Leavenworth, is a Classical Revival edifice built in 1907-09 at 407 Walnut Street overlooking downtown Leavenworth, Kansas. The stretcher-bond brick building features an Ionic portico on the main east elevation on Fourth Street, light-colored stone trim, and a two-story education wing with a bowed south end. The principal windows are contained in round-arch openings, some with pilastered inner surrounds. Exterior alterations have included the addition of the second story to the education wing in the 1930s, the addition and then removal of a belfry, and the addition of buttress-like concrete shores on the north side elevation in 1959. The interior is dominated by the sanctuary with its barrel-vaulted ceiling supported by massive arched spans. The principal decorative treatments are the six large stained glass windows in the sanctuary and the many smaller stained glass windows elsewhere. Several windows were made by Lamb Studios; at least one was made by Tiffany Studios. Movable partitions allow some spaces to be combined or subdivided; historically the entire interior could be opened up this way. A corridor on the first floor of the education wing provides access to a radiating suite of classrooms. First Presbyterian Church, Leavenworth, occupies a parcel of just over a half acre in extent. The church stands in an urban setting surrounded by important institutional buildings including the Leavenworth County Courthouse and the Carnegie Library, both listed in the National Register. - NRHP, 1 November 2006