浅井氏（日语：浅井氏／あざいし）是日本镰仓时代至江户时代的武家氏族，发迹于近江国浅井郡丁野（现滋贺县长滨市内），原本为京极氏的家臣，后来取代主家在近江的地位，虽然一度服从于六角氏，及后再击败六角氏扩展势力，虽然一度与织田氏结盟，可是最终选择与朝仓氏联手对抗织田，然而在姊川之战败给织田信长后势力大减，最终在小谷城之战中灭亡。其后，浅井长政与阿市诞下的长女浅井茶茶（淀殿）嫁给丰臣秀吉、次女浅井初（常高院）嫁给京极高次和三女浅井江（崇源院）则嫁给德川秀忠，其中茶茶和江在关原之战和大坂之阵等多场战事中均处于敌对状态，初则作为丰臣氏与德川氏之间的调解人，尽力让两大势力和平共处，三人对于安土桃山时代至江户时代初期的形势发挥重大的影响力。

The Azai clan(浅井氏,Azai-shi) was a line of daimyo (feudal lords) during Japan's Sengoku period that was based in Ōmi Province (present day Shiga Prefecture). The Azai clan, along with the Asakura clan, opposed Oda Nobunaga in the late 16th century. They were defeated by him at the Battle of Anegawa in 1570, and all but eliminated when their home castle, Odani Castle, was taken three years later.