东阿之名是从《尔雅》“大陵曰阿”而来。“阿”是指境内的大清河在弯曲的地方形成的高地。在东边属于齐国的就称为东阿。西汉时,设东阿为县,《泰安府志》:“郡秦属东郡,汉置东阿县。盖以阿属东郡而立名。”东阿县历史悠久,因靠近黄河的缘故,历史上版图多有更迁。汉承秦置,至北魏时治所东迁,原治所渐为黄水淤废。其后因屡遭黄河泛滥之灾,县 The name of East Asia is from “Erya” “Mausoleum said A ” from. “A ” refers to the territory of the Qinghe River in the curved place of the formation of highlands. In the east belong to Qi country is called East A. In the Western Han Dynasty, East A county was set up, and “Taian Prefecture”: "The county Qin belongs to East County and the East China county is set up in Han Dynasty. As a result, there have been many changes in the history of the territory. Han Cheng Qin home to the Northern Wei Dynasty when the rule of the East, the original rule of the Yellow River silt gradually waste. Later, due to repeated flooding the Yellow River, county