| Country: | England |
| Coordinates: | 54.24°N -3.26°W |
| Official Name: | Arnaby |
| Civil Parish: | Millom Without |
| Shire District: | Copeland |
| Shire County: | Cumbria |
| Region: | North West England |
| Constituency Westminster: | Copeland |
| Post Town: | MILLOM |
| Postcode District: | LA18 |
| Postcode Area: | LA |
| Dial Code: | 01229 |
| Os Grid Reference: | SD1884 |
| Pushpin Map: | United Kingdom Copeland |
| Pushpin Map Caption: | Location in Copeland Borough |
Arnaby is a village in Cumbria, England.