It is bounded by Kapangan on the north, Atok on the east, Itogon and Bokod on the southeast, La Trinidad on the west, and Sablan on the northwest.

According to the Philippine Statistics Authority, the municipality has a land area of 102.55 square kilometres (39.59 sq mi) [5] constituting 3.70% of the 2,769.08-square-kilometre- (1,069.15 sq mi) total area of Benguet.

The topography is generally mountainous with an elevation of 1,400 metres (4,600 ft) above sea level.

Ambassador is the largest barangay in terms of land area (11.52 km2), while Tuel is the smallest (4.79 km2).

Poverty incidence of Tublay Source: Philippine Statistics Authority[12][13][14][15][16][17][18][19] Tublay, belonging to the lone congressional district of the province of Benguet, is governed by a mayor designated as its local chief executive and by a municipal council as its legislative body in accordance with the Local Government Code.