| Official Name: | Chaj Doab |
| Settlement Type: | Natural region |
| Subdivision Type: | Region |
| Subdivision Name: | Punjab |
| Subdivision Type1: | Subregion |
| Subdivision Name1: | Punjab, Pakistan |
| Area Total Km2: | 27,000 |
| Population Total: | - |
| Population As Of: | 2022 |
| Population Density Km2: | auto |
Chaj Doab (Panjabi; Punjabi: {{Nastaliq|چَج دوآب) can be classified as one of the main regions of Punjab, Pakistan.[1] Punjab historically has been divided into regions based on its various rivers, since the name Punjab is based on its five main rivers. The Chaj doab includes the area between the Jhelum and Chenab rivers.[2] It lies on the southern fringes of the Kashmir valley.
This doab covers Gujrat District, Bhimber District, Mirpur District, Mandi Bahauddin District, Sargodha District, Lalian Tehsil of Chiniot District and some areas of Jhang Tehsil of Jhang District.