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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cameroon | 475,440 | 475,440 | 475,440 | 475,440 | 475,440 | 475,440 | 475,440 | 475,440 | 475,440 | 475,440 | 475,440 | 475,440 | 475,440 | 475,440 | 475,440 | 475,440 | 475,440 |
| Central African Republic | 622,980 | 622,980 | 622,980 | 622,980 | 622,980 | 622,980 | 622,980 | 622,980 | 622,980 | 622,980 | 622,980 | 622,980 | 622,980 | 622,980 | 622,980 | 622,980 | 622,980 |
| Chad | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 | 1,284,000 |
| Congo, Rep. | 342,000 | 342,000 | 342,000 | 342,000 | 342,000 | 342,000 | 342,000 | 342,000 | 342,000 | 342,000 | 342,000 | 342,000 | 342,000 | 342,000 | 342,000 | 342,000 | 342,000 |
| Equatorial Guinea | 28,050 | 28,050 | 28,050 | 28,050 | 28,050 | 28,050 | 28,050 | 28,050 | 28,050 | 28,050 | 28,050 | 28,050 | 28,050 | 28,050 | 28,050 | 28,050 | 28,050 |
| Gabon | 267,670 | 267,670 | 267,670 | 267,670 | 267,670 | 267,670 | 267,670 | 267,670 | 267,670 | 267,670 | 267,670 | 267,670 | 267,670 | 267,670 | 267,670 | 267,670 | 267,670 |