Surface area is a country's total area, including areas under inland bodies of water and some coastal waterways.
| 1970 | 1990 | 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Burundi | 27,830 | 27,830 | 27,830 | 27,830 | 27,830 | 27,830 | 27,830 | 27,830 | 27,830 | 27,830 | 27,830 | 27,830 | 27,830 | 27,830 | 27,830 | 27,830 | 27,830 |
| Kenya | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 | 5,80,370 |
| Rwanda | 26,340 | 26,340 | 26,340 | 26,340 | 26,340 | 26,340 | 26,340 | 26,340 | 26,340 | 26,340 | 26,340 | 26,340 | 26,340 | 26,340 | 26,340 | 26,340 | 26,340 |
| South Sudan | 6,46,883 | 6,46,883 | 6,46,883 | 6,46,883 | 6,46,883 | 6,46,883 | 6,46,883 | 6,46,883 | 6,46,883 | 6,46,883 | 6,46,883 | ||||||
| United Republic of Tanzania | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 | 9,47,300 |
| Uganda | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 | 2,41,550 |