Olaine Municipality () is a municipality in Latvia. The municipality was formed in 2009 by merging Olaine parish and Olaine town the administrative centre being Olaine. The population in 2020 was 119,667.
After the 2021 administrative reform, a part of öekava Parish of öekava Municipality (near the village of JÃÂà Âupe) was added to connect both of the separated areas of the municipality.
Olaine is twinned with: