Aiti is some 15 km north of Corte and about 25 km inland from the east coast of Corsica. The Highway N193 from Corte goes north passing near the eastern border of the commune however the commune can only be accessed from this side by the D39 from Francardo a tortuous and circuitous road. The commune can also be accessed from the eastern side from San-Lorenzo on the Highway D39 which has a small connecting road across a bridge to the D39 road which enters the commune from the south and is another tortuous and circuitous route to the village of Aiti. Other than some short mountain access roads there are no other roads in the commune.
The western border of the commune is the Callasima River which feeds into the Golo River
In 2009, the commune had 32 inhabitants. The evolution of the number of inhabitants is known through the population censuses conducted in the town since 1793. From the 21st century, a census of municipalities with fewer than 10,000 inhabitants is held every five years, unlike larger towns that have a sample survey every year.[Note 1][Note 2]
^At the beginning of the 21st century, the methods of identification have been modified by law No. 2002-276 of 27 February 2002 , the so-called "law of local democracy" and in particular Title V "census operations" which allow, after a transitional period running from 2004 to 2008, the annual publication of the legal population of the different French administrative districts. For municipalities with a population greater than 10,000 inhabitants, a sample survey is conducted annually, the entire territory of these municipalities is taken into account at the end of the period of five years. The first "legal population" after 1999 under this new law came into force in 1 January 2009 and was based on the census of 2006.
^In the census table and the graph, by convention in Wikipedia, and to allow a fair comparison between five yearly censuses, the principle has been retained for subsequent legal populations since 1999 displayed in the census table and the graph that shows populations for the years 2006, 2011, 2016, etc.. , as well as the latest legal population published by INSEE