
Mountain dulcimer is a North American lap-played fretted zither associated with the Appalachian region of the United States. It features a diatonic fretboard (often with added "6½" and sometimes "1½" frets), two or more drone strings, and a modal sound that suits ballads, hymns, and dance tunes.
Traditionally tuned to modal tunings such as DAA (Ionian) or DAD (Mixolydian), it is strummed or flatpicked while resting on the player’s lap. Older styles use a small wooden stick (noter) to stop the melody string while drones ring; contemporary approaches add fingerstyle, chord–melody, and cross-string drones. The instrument’s airy resonance and pentatonic/modal vocabulary give it a distinctively nostalgic, intimate tone that adapts well to old-time music, Celtic airs, waltzes, and modern arrangements.
The mountain dulcimer emerged in the Appalachian highlands during the 1800s, evolving from European fretted zithers such as the German scheitholt and related board zithers brought by settlers of Scots-Irish, English, and German descent. In rural communities, it became a home music instrument for ballads, hymns, play-party songs, and dance tunes. Its diatonic fretboard and drone strings supported modes common to Anglo-American song traditions.
Through the early 20th century, the dulcimer remained a regional folk instrument made by local luthiers, with distinctive hourglass, teardrop, or elliptical body shapes. Mid-century tradition bearers and craftspeople carried the instrument beyond Appalachia. During the 1950s–60s American folk revival, performers and educators introduced the dulcimer on college campuses, in song collections, on recordings, and on festival stages, turning a regional practice into a national folk icon.
Specialist makers standardized build quality and scale lengths; contest stages and festivals (along with workshops and instructional books) helped codify technique. Players integrated flatpicking, fingerpicking, and chord–melody approaches; luthiers added the now-common "6½" fret to ease major-scale harmony. The repertoire broadened from ballads and fiddle tunes to include Celtic airs, contemporary folk, ragtime, and even classical transcriptions.
Today the mountain dulcimer enjoys worldwide communities, with formal pedagogy, online lessons, and ensembles. Modern performers employ capos, alternate tunings (DAD, DAA, DAC, DAG, CGC), chromatic fretboards, and amplification with light effects. The instrument appears in Americana, indie folk, Celtic-influenced new-age settings, and educational programs, while remaining a living link to Appalachian musical heritage.