MOSCOW, Sept 20 (Reuters) - Russia's banking sector net profit rose to 244 billion roubles ($3.3 billion) in August, up 6.6% from 229 billion roubles in July, the central bank said on Monday.

In the first eight months of the year, Russian banks made a net profit of 1.7 trillion roubles and are on course for a record-high annual profit of 2.5 trillion roubles in 2021, the central bank said.

($1 = 73.5545 roubles) (Reporting by Elena Fabrichnaya; writing by Vladimir Soldatkin; editing by David Evans)