| 1840 Naval Air Squadron | |
|---|---|
| Active | 1944-45 1951-57 |
| Country | United Kingdom |
| Branch | Royal Navy |
| Part of | Fleet Air Arm |
1840 Naval Air Squadron (1840 NAS) was a Naval Air Squadron of the Royal Navy's Fleet Air Arm. Over 80% of the pilots were from the Royal Netherlands Naval Aviation Service.