Brooklyn first formed from the amalgamation in 1856 of two settlements, the sites of which are both now within the city limits of Oakland: San Antonio and Clinton. The name Brooklyn commemorated the ship that had brought Mormon settlers to California in 1846. In 1870, Brooklyn absorbed the nearby town of Lynn, which housed a footwear industry, and incorporated as a city.
A post office was opened in Brooklyn in 1855; it became a branch of the Oakland post office in 1878. Coordinates for the former location of Brooklyn as shown on this page were obtained from the USGS Geographic Names Information System (GNIS).
Looking at historical maps Brooklyn is shown as a fairly large area, lying adjacent and to the south of Lake Merritt and the Piedmont tract, adjacent and to the east of Alameda and adjacent and to the north of the San Leandro Creek and the town of San Leandro. Today this is East Oakland.