Wolfenbüttel District Coat of arms Country Germany State Lower Saxony Capital Wolfenbüttel Area • Total 722.33 km2 (278.89 sq mi) Population (31 December 2015)[1] • Total 120,981 • Density 170/km2 (430/sq mi) Time zone CET (UTC+1) • Summer (DST) CEST (UTC+2) Vehicle registration WF Website lk-wolfenbuettel.de