सिवान जिला के क्षेत्रफल {{convert|2219| km2|sqmi}} बा,<ref name='Reference Annual'>{{cite book | last1 = Srivastava, Dayawanti et al. (ed.) | title = India 2010: A Reference Annual | chapter = States and Union Territories: Bihar: Government | edition = 54th | publisher = Additional Director General, Publications Division, [[Ministry of Information and Broadcasting (India)]], [[Government of India]] | year = 2010 | location = New Delhi, India | pages = 1118–1119 | accessdate = 2011-10-11 | isbn = 978-81-230-1617-7}}</ref> तुलनात्मक रूप में देखल जाव त रूस के विलजेक लैंड के बराबर बा।<ref name='Islands'>{{cite web | url = http://islands.unep.ch/Tiarea.htm | title = Island Directory Tables: Islands by Land Area | accessdate = 2011-10-11 | date = 1998-02-18 | publisher = [[United Nations Environment Program]] | quote = Wilczek Land2,203km2}}</ref>
