Ajjanahalli, Bangalore South is a village in the southern state of Karnataka, India. It is located in the Bangalore South taluk of Bangalore district in Karnataka.

As of 2011 India census, Ajjanahalli had a population of 2,541. Males constitute 1,270 of the population and females 1,271. Kannada is the official and most widely spoken language in Ajjanahalli. Ajjanahalli has an average literacy rate of 67 percent, higher than the national average of 59.5 percent, with 72.60 percent of the males and 61.40 percent of females literate.

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