 Erlach was the capital of the Amtsbezirk Erlach until 31 December 2009 when the district was dissolved.On the following day, 1 January 2010, it joined the newly created Verwaltungskreis Seeland.The blazon of the municipal coat of arms is "Gules an Alder Tree eradicated Or leaved Vert between a Crescent and a Mullet of the second."