Järntorget, Pedestrian square in Gamla stan, Stockholm, Sweden.

Järntorget is a small public square in the southern corner of Gamla stan, Stockholm, where Västerlånggatan and Österlånggatan meet. Two alleys, Södra and Norra Bankogränd, run east to Skeppsbron, while Järntorgsgatan and Triewaldsgränd lead south. The square is flanked by the Södra Bankohuset and has a cast-iron pump in the middle.

The square emerged in 1489 from the transformation of Korntorget and took its new name as the iron trade replaced grain commerce. This renaming marked a turning point in Stockholm's medieval economy.

The Evert Taube statue on the pavement outside Södra Bankohuset was made by Karl Göte Bejemark in 1985. Taube's regular tavern, Den gyldene freden, stands about twenty metres away. Sundbergs konditori, founded in 1785 and calling itself Stockholm's oldest, also faces the square.

The square is easily reached by public transport, with several bus routes and metro stations nearby. Visitors can find many restaurants and cafes where they can stop and enjoy the surroundings.

Södra Bankohuset at Number 84 was built in three stages between 1675 and 1735, with Nicodemus Tessin the Elder, Nicodemus Tessin the Younger and Carl Hårleman as architects. It was one of the first buildings in northern Europe erected specifically for banking purposes and has been a listed building since 1935.