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]WordNet (r) 3.0 (2006):
stateswoman n 1: a woman statesman