I did a little digging and the answer is: no one is sure. I will run down the most likely candidates: Paradis [Paradisi], Maria Teresa von (1759-1824) [Dave's guess] wrote 2 piano concertos, both are apparently "lost", so who knows the dates... Martinez, Marienne (1774-1812) wrote 2 piano concertos but no dates are given; either would predate the Clara Schumann necessarily. Kauth, Maria Magdalena (late 18th cent) Concerto for Piano & Orchestra (1792) Never heard of her. But this is the earliest one with a date I could find...almost. Well, the earliest "proper" piano concerto as we would call it today. The above were listed under "orchestral" (as opposed to "chamber"). I found 2 others that are more like "chamber concertos" but back in the day maybe 12 people could be an "orchestra"? I'll let y'all decide: Cecile, Jeanne (18th cent) [Chamber] Concerto for piano, 2 vns, 2 ob, 2 hns, va & continuo (1783) Anna Amalia, Dutchess of Saxe-Weimar (1739-1807) Concerto for Harpsichord Obbligato & 12 instruments no dates but could be early since she died before most of the rest of them...does a harpsichord concerto count? Maybe not... So I reckon that the earliest -verifiable- piano concerto by a woman composer AFAIKT was the Cecile (chamber) piano concerto; if only full orchestras count then go with the Kauth. Hope this helps, Dave. Bob K.