Amsterdam-West is a borough (Dutch: stadsdeel) of Amsterdam, Netherlands, to the west of the centre of the city. This borough was formed in 2010 through the merging of four former boroughs Oud West, Westerpark, De Baarsjes and Bos en Lommer. This part of Amsterdam was built roughly between the end of the 19th century and 1960. In 2013, the borough had approximately 142,700 inhabitants. With about 14,000 inhabitants per km2, West is also the most densely populated borough of Amsterdam.