| Ajka District | |
| Native Name: | Ajkai járás |
| Native Name Lang: | hu |
| Settlement Type: | Districts of Hungary |
| Image Blank Emblem: | HUN Ajka Címer.svg |
| Blank Emblem Type: | Coat of arms |
| Subdivision Type: | Country |
| Subdivision Type1: | County |
| Subdivision Name1: | Veszprém |
| Seat Type: | District seat |
| Seat: | Ajka |
| Area Total Km2: | 320.71 |
| Area Rank: | 7th in Veszprém |
| Population As Of: | 2011 census |
| Population Total: | 39,160 |
| Population Rank: | 3rd in Veszprém |
| Population Density Km2: | 122 |
Ajka (Hungarian: Ajkai járás) is a district in central-western part of Veszprém County. Ajka is also the name of the town where the district seat is found. The district is located in the Central Transdanubia Statistical Region.
Ajka District borders with Pápa District to the north, Veszprém District to the east, Tapolca District to the south, Sümeg District and Devecser District to the west. The number of the inhabited places in Ajka District is 11.
The district has 1 town and 10 villages.[1] The bolded municipality is city.