In 1868 , the Adapazarı Municipality was officially founded on the town called Der Seadet . A sugar factory and agricultural sugar factory attracted many migrants and accelerated the industrialization of the city . A law passed on 17 June 1954 in the Grand National Assembly saw the city separated from Kocaeli Province and made the center of its own province . The 1999 Marmara earthquake affected Adapazarı and inflicted losses in lives and damage . In the 2000 official census , the population was recorded as 158 474 . By official decree , the province was renamed Sakarya after the Sakarya River which runs through it
1999 Marmara earthquake
1999 İzmit earthquake
Adapazarı