River Finn

River Finn or Finn River may refer to two rivers in Ireland:


 * River Finn (Foyle tributary) — mainly flows through County Donegal, into the River Foyle
 * Finn River (County Fermanagh and County Monaghan) — a small river that flows into Upper Lough Erne

See also:
 * River Fynn, a suffolk river that flows into the Deben