Ernst-Thälmann-Park, Public park in Prenzlauer Berg, Germany

Ernst-Thälmann-Park is a green space built on a former gas plant site in Berlin's Prenzlauer Berg neighborhood, with ponds, play areas, and residential buildings. The grounds also contain a planetarium, cultural facilities, and an indoor swimming pool offering various recreational options.

The IV. Berliner Gasanstalt operated on this site from 1873 to 1981, the longest-running gas works in Berlin, producing lighting gas for the city's street lamps and later water gas, generator gas and benzene. Its gasometers, 65 m across, became a Prenzlauer Berg landmark. Demolition began after 1981; the last gasholder was blown up on 28 July 1984 despite local protests. The park opened on 16 April 1986, Ernst Thälmann's 100th birthday.

The park's name honours Ernst Thälmann, the Communist Party leader born in 1886 and killed in 1944; it was inaugurated on 16 April 1986, his hundredth birthday. A small theatre, galleries and public houses now occupy the former administrative building of the gas plant. In 1997 residents voted against renaming the park.

The park is bounded by Prenzlauer Allee to the west and Greifswalder Straße to the east, running from the Ringbahn S-Bahn line south to Danziger Straße. It is reached by S-Bahn at Prenzlauer Allee or Greifswalder Straße stations, or by tram lines M2, M4 and M10. Of the 25 hectares, 16 are pure park and green space.

The 14-metre bronze of Ernst Thälmann was made by Soviet sculptor Lev Kerbel between 1981 and 1986, the figure shown with raised fist against a sweeping flag. Since the early 2000s skateboarders have used its stepped plinth, and Kenny Hopf filmed a video here during the 2020 COVID lockdown.