Águas de São Pedro
Recognizing the importance of the thermal springs in the region, the São Paulo State Government on 19 June 1940 founded the (Hydromineral and Climatic Spa of Águas de São Pedro). Despite this, the city celebrates its birthday on 25 July, the date in 1940 of the founding of the first major building in the city, the "Grande Hotel" (now "Grande Hotel São Pedro"). The municipality of Águas de São Pedro was incorporated by State Law No.233, of 24 December 1948.
Pederneiras
Starting from 1842, small villages were established in the area of the Tietê River. In 1848 Manoel dos Santos Simões and his two sons, Manuel Leonel dos Santos and João Leonel dos Santos, established a farm in the parish of Botucatu. They named the farm "Pederneiras" after the large amount of flint stone in the area. In 1865, the settlement became part of the municipality of Lençóis Paulista. Four years later it became a parish with the name "São Sebastião de Alegria". Coffee plantations led to growth of the settlement, and in 1891 it became a separate municipality. In 1895, the town's name was changed back into "Pederneiras".