Krek Square, Monument of local significance in Ljubljana, Slovenia

Krek Square is a paved square at the foot of Ljubljana Castle hill, between Vodnik Square and the tunnel under the castle. It was laid out in 1816 on ground left empty after the city walls were demolished. Its largest building is the Mestni dom, begun in 1898 to plans by Ciril Metod Koch, now housing the Ljubljana Puppet Theatre and Šentjakob Theatre. The square is used as a public car park.

The square was laid out in 1816 on ground cleared by the demolition of Ljubljana's city walls, near the former Franciscan Gate. It first served as a fairground, hence its early name Sejemski trg. It was renamed Emperor Joseph Square (1876–1918), King Peter Square (1918–19), and then Krek Square after Janez Evangelist Krek.

The square is named after Janez Krek, a prominent 19th-century Slovenian priest and intellectual whose legacy shapes the character of this urban space. Visitors can see how the location serves both as a gathering point and a connection between different parts of the city.

The square lies between Vodnik Square and the tunnel under the castle, at the foot of Castle Hill. A funicular to Ljubljana Castle has run from the square since 2006. The square itself is used as a public car park.

The square's name has changed with each regime: fairground name Sejemski trg, then Cesarja Josipa trg from 1876 to 1918, Trg kralja Petra in 1918–1919, and Krekov trg since, after Janez Evangelist Krek. A corner icehouse built in 1919 kept food cold here until 1928.