Alexey Borisovich Miller (Russian: Алексей Борисович Миллер) (born January 31, 1962) is Deputy Chairman of the Board of Directors and Chairman of the Management Committee (CEO) of Russian energy company Gazprom, Russia's largest company and the world's biggest natural gas producer.

Miller was born in Leningrad (now Saint Petersburg) to a family of German ethnicity. He obtained a PhD in Economics in 1989 from the N.A. Voznesenskii Leningrad Finance and Economics Institute. From 1991 to 1996 Miller served with the Committee for External Relations of the Saint Petersburg Mayor's Office under Vladimir Putin. From 1996 to 1999 he was Director for Development and Investments of the Port of Saint Petersburg. From 1999 to 2000 he served as Director General of the Baltic Pipeline System. In 2000 he was appointed Deputy Minister of Energy of the Russian Federation, and since 2001 he has served as Chairman of the Management Committee of Gazprom.

In December 2005 Miller was named Person of the Year by Expert magazine, influential and respected Russian business weekly. He shared the title in 2005 with Dmitry Medvedev, Chairman of the board of Gazprom.