The town of Tanay lies at the foot of the Sierra Madre Mountain with bearings of 14 degrees, 30 minutes North Latitude and 121 degrees, 17 minutes East Longitude. It is 57 Kilometers away from the City of Manila. It is bounded on the north by the towns of Antipolo, Baras, Teresa and Montalban, Rizal. On the East by Quezon Province, on the South by Sta. Maria, Laguna and Pililla, Rizal and on the West by Laguna de Bay.

Due to its geographical location, the people of Tanay enjoy the bounties of the Laguna de Bay, which is a fresh water lake. However, the increasing deterioration of the lake has raised serious concerns on the quality of the aquatic resources available.