1. The figures in this table relate to the Indian Empire except certain tracts beyond the administrative frontier in Assam  and Burma. They do not relate to those parts of the peninsula which are outside the Indian Empire .

 2. The Settlement of Aden Including Perim Island is included, but not the Aden Protectorate .
 3. Details of some of the principal States included in the Agencies and Provincial States groups will be found on page 4 where also is shown the population of the areas under British Administration in certain Indian States .
4. The figures in this table are based on a detailed enumeration on the standard schedule except in the following cases:-

In the case of the Baluchistan Tribal Areas a simplified form of schedule was employed. In the other areas in the population was estimated after a careful inquiry. For the manner in which the estimates were made, reference should be made to the corresponding reports.

 5. The 33 units which appear in the 1921 table have now become 35 in consequence of the following changes:- 

              1. The Western India States Agency has been separated from Bombay.

              2. The Punjab States Agency has been separated from the Punjab.

The Madras States Agency has similarly been separated from Madras, But this has not involved any change in this table, as it appeared separately in 1921. The census of the Madras Province, except in the case of Travancore and Cochin, which as before have acted independently, their reports being included in the India series. 

6. In the Province of Assam the Khasi States, Previously included for census purposes in British Assam, have now been shown separately under the head ‘ Assam States’ which formerly had reference to Manipur State only . Separate figures for these States do not appear in Table XX, but with the exception of these and other very small States figures will be found in that table not only for the States which are not shown separately in the general tables. 

7. The topographical surveys carried out during the decade in various parts of India have resulted in a revision of area figures which accounts for some discrepancies between areas given here and in 1921 and for an increase of 1045 sq. miles in the computation of the area censused in that year. Other changes are accounted for by inter-provincial transfers. The remaining areas are at present under revision but the figures are not yet available. An area of 908 square miles incorporated into British India from the previously un-administered tracts on the Assam frontier, and an area estimated at 1,400 sq. miles similarly incorporated into the Chin Hills District in Burma have been included for the first time while 5 square miles formerly in the United Provinces have been ceded to Nepal, making a total addition of 2,302 square miles to the area of India on its external boundaries. Para 2 of the fly leaf to table II gives the corresponding population figures of these areas.