| Kunbaja | |
| Other Name: | Kumbaj, Kunbaja |
| Pushpin Map: | Hungary |
| Pushpin Map Caption: | Location of Kunbaja |
| Coordinates: | 46.085°N 19.421°W |
| Subdivision Type: | Country |
| Subdivision Type1: | County |
| Subdivision Name1: | Bács-Kiskun |
| Area Total Km2: | 33.72 |
| Population Total: | 1802 |
| Population As Of: | 2005 |
| Population Density Km2: | 53 |
| Postal Code Type: | Postal code |
| Postal Code: | 6435 |
| Area Code: | 79 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
Kunbaja (German: Kumbaj or German: Kunbaja) is a village and municipality in Bács-Kiskun county, in the Southern Great Plain region of southern Hungary.
The village name reflects the presence of Kumans in this region.
It covers an area of 33.720NaN0 and has a population of 1802 people (2002).