| File format | Extension |
| Access Project | .adp |
| Access Blank Project Template | .adn |
| Access Database (2007) | .accdb |
| Access Database (2003 and earlier) | .mdb |
| Access Database, used for addins (2,95,97), previously used for workgroups (2). | .mda |
| Access Workgroup, database for user-level security. | .mdw |
| Access (SQL Server) detached database (2000) | .mdf |
| Protected Access Database, with compiled VBA (2003 and earlier) | .mde |
| Protected Access Database, with compiled VBA (2007) | .accde |
| Windows Shortcut: Access Macro | .mam |
| Windows Shortcut: Access Query | .maq |
| Windows Shortcut: Access Report | .mar |
| Windows Shortcut: Access Table | .mat |
| Windows Shortcut: Access Form | .maf |