Guaynabo (is a municipality in the northern part of Puerto Rico, located in the northern coast of the island, north of Aguas Buenas; south of Cataño; east of Bayamón; and west of San Juan. Guaynabo is spread over 9 wards and Guaynabo Pueblo . Guaynabo is considered, along with its neighbors - San Juan and the municipalities of Bayamón, Carolina, Cataño, Toa Alta, Canovanas, Caguas, Toa Baja, and Trujillo Alto - to be part of the Área Metropolitana of San Juan . It is also part of the larger San Juan-Caguas-Fajardo Combined Statistical Area. The municipio has a land area of 70.26 km² and a population of 100,053 as of the 2000 census.