Alina Barbara Pienkowska (12 January 1952 – 17 October 2002; her surname is often misspelt as Pieńkowska) was a Polish free trade union activist and a Senator for Gdańsk (1991–1993, Solidarity Parliamentary Club).

She wrote health-related articles for the underground journal, The Coastal Worker, mostly related to shipyard safety and rising accident rates.

On the third day of the strike, on 16 August 1980, management granted Lenin Shipyard workers their working and pay demands.

Pienkowska was then among the authors of the 21 demands of the Interfactory Strike Committee, 17 August 1980, which led to the Gdańsk Agreement, of which she was a signatory.

She and her husband later joined the Freedom Union, the party led by post-Communist Poland's first freely elected Prime Minister, Tadeusz Mazowiecki.

In 1998 she became a member of the city council in Gdańsk and was active in local politics and in health issues until the end of her life.