德意志关税同盟（德语：Deutscher Zollverein）于1834年由38个德意志邦联的邦国组成。在当时工业革命的浪潮，同盟的成立有助贸易往来、减少内部竞争。而同盟成立的主要倡导者是经济学家弗里德里希·李斯特。由于同盟充满贸易保护主义的色彩，它不容许奥地利加入，这令奥国与普鲁士的竞争更为激烈。1866年，由于同盟中的南德邦国在普奥战争中支持奥地利，同盟解散。但在1867年，这些邦国愿意重返同盟后，它又重新成立。新同盟更具凝聚力，因为任何成员国都没有否决权。

同盟由普鲁士创建。最初，成员国只包括普鲁士与它的邻国。由于普鲁士当时的领土东西分隔，同盟能帮助货物的运送。后来，经过普鲁士政府多年的游说，成员国陆续增加。奥地利也积极组成她的关税同盟，但较为审慎，成员国也寥寥可数。

The Zollverein ([ˈtsɔlfɛɐ̯ˌʔaɪn]) or German Customs Union was a coalition of German states formed to manage tariffs and economic policies within their territories. Organised by the 1833 Zollverein treaties, the Zollverein formally came into existence on 1 January 1834. However, its foundations had been in development from 1818 with the creation of a variety of custom unions among the German states. By 1866, the Zollverein included most of the German states. The foundation of the Zollverein was the first instance in history in which independent states had consummated a full economic union without the simultaneous creation of a political federation or union.