Tanay with its Barangays in Poblacion, celebrated its Fiesta every 22nd, 23rd, and 24th of January commemorating the town's patron, Saint Ildephonsus of Toledo and Our Lady of Guadalupe. Events like Amateur Singing Contest, Serenata, Band Drill Jamboree, prestigious pageants like Mr.Pogi and Miss Gay Exceptionals, are held in this season.
Tanay was settled by early Austronesian people. Shortly after the conquest and subjugation of Manila by the Spaniards and the surrounding lake areas by Juan de Salcedo in 1570-1574, Franciscan missionaries arrived to Christianize the inhabitants of what is now the Morong-Pililla area. In 1583, both Morong and Pililla were created as separate towns with Tanay forming part of Pililla.
Tanay was founded as a separate pueblo (town) in 1606 under the name "Monte de Tan-ay". In 1620, administration was moved to San Antonio (now called Inalsan or Pantay) and Tandang Kutyo. In 1638, the town was burned during an uprising of Chinese living in the area, and the town was rebuilt in 1640 at the present day location.
In 1747, the town of Tanay consisted of only eight barangays, namely Nuestra Senora del Rosario, Sa Josep, San Ildefonso de Tanay, San Francisco de Maytubig, San Pedro de Alcantara, San Lucas y San Antonio, San Apostol and San Agustin de Balugbog.
In 1853, a new political subdivision was formed. The town of Tanay together with Morong, Baras, Pililla, Angono, Binangonan and Jalajala form the Province of La Laguna, with the capital at Morong. This district was later changed to Distrito Politico-Militar de Morong after four years.
Tanay members of the Katipunan fought valiantly during the Revolution against Spain. The town was the headquarters of the second military area of the Philippine Revolutionary Government under General Emilio Aguinaldo. And for a brief period between 1899 and 1900, Tanay served as the capital of the then Morong Province after Philippine–American War broke out and the American forces invaded the lake towns and captured Antipolo.
In 1942–1945 the Mountains of Tanay served as the Guerrilla base for 'Marking's Fil-American Guerrillas, beginning the Liberation of Tanay on March, 1945 a very decorated by the Filipino soldiers of the 41st and 42nd Division of the Philippine Commonwealth Army, 4th Regiment of the Philippine Constabulary and the recognized guerrillas against the Japanese occupation forces during World War II. Gen. Agustin Marking is buried in a private cemetery by the road overlooking his son's farm in Sampaloc.
The majority of the population consists of Tagalogs who live near Laguna de Bay, though there is also a significant percentage of mountain dwelling people living in the northern portions of the municipality. The town's major trades consist of fishing, agriculture and regional commerce.
Calinawan Cave and Rawang Pass: Stronghold of the Filipinos in the Revolution against Spain and in the Filipino-American War in April–May 1900. It also housed the towns people during the Second World War, beginning the Invasion of Tanay in March, 1945 from the Filipino soldiers and recognized guerrillas against the Japanese Imperial forces.
Daranak Falls and Batlag Falls: A popular local tourist attraction.
Masungi Rock, in the Sierra Madre mountains near Cuyambay, may be of interest to hikers and geologists.
Parola, the historic lighthouse of Tanay, offers a picturesque view of Laguna de Bay as well as several nearby restaurants.
Tanay Church: Also known as Saint Ildefonsus of Toledo Parish Church or Iglesia Parroquial de San Ildefonso de Toledo(in spanish), was built between 1773–1783 using forced labor, and is the second oldest church in the province. Commonly known for its Station of the Cross which hailed as one of the most artistic in Asia with its controversial "Bolo knife" used by a roman soldier. Declared as one of the five Jubilee Churches in the Diocese of Antipolo and National Cultural Heritage by the National Commission for Culture and the Arts along with 25 other churches all over the Philippines.
Tanay Coliseum, near the Municipal Hall, features cockfights and local boxing matches.
Tanay Park: Adjacent to the church, this is the main social gathering place in the town, where during festivals one may observe performances of the Tariki dance, or the Subok. It is also the place where Annual Amateur Singing Contest is held during the Fiesta Season (January 22,23,24).A monument of José Rizal also stood there.
Tanay Town Center (SaveMore): The First Community Mall ever established at Tanay, showing the start of Business Development in the Area.
Regina Rosarii Institute of Contemplation in Asia (Regina RICA): A 71-foot-tall statue of the Queen of the Holy Rosary.
Tanay Adventure Camp, at Sitio Malaanonang, Tanay, Rizal, 1 km from the University of Rizal System, holds the record for having the longest zip line (230m) in Rizal.
Daraitan: a barangay with 1 hour trip from the town. Its famous attraction is the clean Daraitan River.
DSWD National Training School for Boys and Golden Acres (Home for the Aged): Located at Sampaloc, Tanay, Rizal. A home for some Children In Conflict with the Law and a conducive place for elderly.
The Municipal Council approved the P80+ million budget for the construction of the new municipal building of Tanay. The lending company will be the Landbank of the Philippines, Tanay Branch. Certain issues and debates from different sectors and influential names about the construction arrouses, and still now under public consultation and hearing.
The municipality also held its festival named HANE Festival. HANE comes from their term of saying OK. For example: "Do a great job OK?" or when you are in Tanay townsfolk will say, "Do a great job HANE? or in Tagalog: Galingan mo trabaho mo HANE?. It starts November 12 which happens to be the anniversary of San Ildefonso Parish, the towns Parish, and ends November 20. It presents the beauty of Tanay, Street Parades and Contests and Amateurs on Tanay Park every day of the festival. The festival begins when the soldiers fire the cannon with Bishop Gabriel Reyes, Rev. Fr. Noeh Elnar and Rev. Fr. Jose Evan Yuri Alumbro after the mass for the Anniversary of the Parish. The festival's first year was 2011.
To promote and market the town’s cattle and agri-eco tourism not only within the municipality but also in the CALABARZON region, the Municipal Government of Tanay holds Tanay Rodeo every third week of January each year. The festival is also in line with the celebration of Tanay Town Fiesta. It is participated by professionals and rodeo enthusiasts, and veterinary/animal science students from renowned universities in the country.