Akhtubinsk (Russian: Ахту́бинск) is a town and the administrative center of Akhtubinsky District in Astrakhan Oblast, Russia, located on the left bank of the Akhtuba River (a tributary of the Volga), 292 kilometers (181 mi) north of Astrakhan, the administrative center of the oblast. Population: 41,853 (2010 census); 45,542 (2002 Census); 50,261 (1989 Soviet census); 30,000 (1968).

It was founded in 1959 by the merger of three settlements: Vladimirovka, Petropavlovskoye, and Akhtuba.

Within the framework of administrative divisions, Akhtubinsk serves as the administrative center of Akhtubinsky District. As an administrative division, it is, together with five rural localities, incorporated within Akhtubinsky District as the town of district significance of Akhtubinsk. As a municipal division, the town of district significance of Akhtubinsk is incorporated within Akhtubinsky Municipal District as Akhtubinsk Urban Settlement.

The major enterprises in the town include a shipbuilding and repair plant, a milk factory, a meat factory, a bakery, and a mineral water plant.

Akhtubinsk is the transfer point for Bassol, the industrial complex which extracts salt from Lake Baskunchak.

The Volgograd–Astrakhan road passes through Akhtubinsk.

A state flight testing center known as Valery Chkalov 929 GLITs MO RF is located in Akhtubinsk. The Groshevo (Vladimirovka) military testing range is located to the north of Akhtubinsk.

In 2012 construction of a site for flight test operations began, including new runway specifically designed to accommodate flight testing of the Sukhoi Su-57 stealth fighter currently under development.