YAUCO, a city of the department of Ponce, Puerto Rico, 20 m. W. by N. of the city of Ponce. Pop. (1899) 6108. Yaucois served by the American Railroad of Pcrto Rico. The city is situated about 150 ft. above the sea, and has a delightful climate. It is connected by a wagon road with its port, Guanica (pop. about 1000), which has an excellent harbour. Coffee and tobacco are the chief industries. Yauco was first settled in 175.