According to the 2020 census, it has a population of 39,572 people. Manay is located in Davao Oriental seated the Philippine Sea. How Manay Got Its Name:
It was one bright morning in the year 1860 when three sisters went to the river to wash their clothes and to take a bath. While they were in the river, they noticed in the galleon vessel filled with Spanish Soldiers entering the mouth of the riv
er, now known as Manay River. Stricken with fear, the two elder sister ran at fast as they could leaving behind the youngest sister who trailed far behind the older sister, shouted: Manay! (Manay is a word in the Davawenyo dialect used in addressing an older sister with due respect.) This was the first word the Spaniards heard upon disembarking from their vessel and eventually termed it in the referred to the valley of municipality, known as Manay. Creation of Manay:
The Municipality of Manay was the barrio in the northeastern side of Casauman river which under the jurisdiction of the Municipality of Caraga was the first municipality created in this undivided Province of Davao. The south in the southeast of the river was part of the territory of the Municipality of Mati. The said year, 1897, The barrio of Manay was created into a municipality by virtue of the Administrative Code of the Department of Mindanao and Sulu, out of the barrios of Central,San Isidro, Concepcion, San Fermin, Manreza, and Santa Maria (Zaragoza) of the Municipality of Caraga, and the barrio of Santa Cruz (Holy Cross) San Ignacio of Municipality of Mati. Later in 1917, it was amended by virtue of Executive Order No.7, Governor Causin. Manay then consisted of 8 barrios: In 1964 the sitios of Cayawan, Del Pilar and Rizal metamorphosed into regular barrios: Guza, Capasnan and Taocanga in 1968, Mabini and Old Macopa in 1969, in 1983 Lambog become the latest in addition to the regular barangays to the seventeen (17) barangays that constitute the municipality.