| a | | Projected est. (medium fertility variant). |
| b | | The land area of Singapore comprises the mainland and other islands. |
| c | | 2023 |
| d | | 2019 |
| e | | 2024 |
| f | | Includes quarrying. |
| g | | Exc. irrigation canals and landscaping care. |
| h | | Data classified according to ISIC Rev. 4. |
| i | | Exc. publishing activities. Inc. irrigation canals. |
| j | | Excluding quarrying. |
| k | | Inc. publishing activities and landscape care. Exc. repair of personal and household goods. |
| l | | Estimate. |
| m | | Data refers to a 5-year period preceding the reference year. |
| n | | Calculated by the UN Statistics Division. |
| o | | Data refer to fiscal years beginning 1 April. |
| p | | 2022 |
| q | | Data at 1 January of the reporting year. |
| r | | Population aged 7 years and over. |
| s | | Population aged 16 to 74 years. |
| t | | Excluding Malaysian citizens arriving by land. |