The Collaborative International Dictionary of English v.0.48:

Stateswoman \States"wom`an\ (-w[oo^]m`an), n.; pl. Stateswomen
   (-w[i^]m`[e^]n).
   A woman concerned in public affairs.
   [1913 Webster]

         A rare stateswoman; I admire her bearing. --B. Jonson.
   [1913 Webster]