Frio, a S. W. county of Texas, intersected by the Rio Frio and Rio San Miguel; area, 1,050 sq. m.; pop. in 1870, 309, of whom 15 were colored. The surface is diversified; there is good farming land along the rivers, and considerable timber. Stock raising is the leading pursuit. The chief productions in 1870 were 8,080 bushels of Indian corn and 13,948 lbs. of wool. There were 1,273 horses, 60,834 cattle, 5,284 sheep, and 2,095 swine.