|• Official||Malayalam, English|
|Time zone||IST (UTC+5:30)|
As of 2001[update] India census, Olavanna had a population of 30,927. Males constitute 49% of the population and females 51%. Olavanna has an average literacy rate of 83%, higher than the national average of 59.5%: male literacy is 85%, and female literacy is 80%. In Olavanna, 12% of the population is under 6 years of age.
- "Census of India 2001: Data from the 2001 Census, including cities, villages and towns (Provisional)". Census Commission of India. Archived from the original on 2004-06-16. Retrieved 2008-11-01.
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