St. Nicholas Cathedral, Eastern Orthodox cathedral in Aktobe, Kazakhstan.

St. Nicholas Cathedral is a two-storey Orthodox church of monolithic construction clad in red brick with a yellow pattern, crowned by five domes and a 45-metre bell tower. Its ground floor houses a baptismal church, and the building covers 778.46 square metres near the 11th microdistrict.

The cathedral was built between 2006 and 2008 to serve Aktobe's growing Orthodox community, replacing two smaller churches. A cornerstone was laid in August 2006, and the building was consecrated on 22 September 2008 in the presence of presidents Nursultan Nazarbayev and Dmitry Medvedev. It was elevated to cathedral status by Patriarch Kirill I at the request of the local bishop.

The cathedral is named after St. Nicholas, Metropolitan of Alma-Ata and All Kazakhstan, and its first liturgy on 25 October 2008 commemorated him. A memorial plaque honours local businessman Nikolai Zhilenkov, who devoted his last years to the construction. The building stands near the Nurgasyr Mosque, whose construction began at the same time.

Visitors can explore the cathedral during prayer times and should expect quiet, reflective moments inside. During major religious holidays and celebrations, the space becomes more crowded as more people gather for services.

The cathedral was modelled on the Cathedral of Saints Peter and Paul in Novotroitsk, Orenburg Oblast, not on a local prototype. Its construction cost 486 million tenge, with about 100 million more spent on the interior, funded by donations from citizens and companies. A memorial plaque honours Nikolai Zhilenkov, the Aktobe businessman who devoted his last years to the building.