England · Geographic county
Middlesex county flag

Registered county flag
| County | Middlesex |
| Geographical grouping | England |
| Design attribution | College of Arms |
| Status checked | 24 October 2026 |
Design and symbolism
Three white seaxes with golden hilts are set on red beneath a golden Saxon crown. The crown distinguishes the design from the related Essex emblem.
History and use
The seaxes have a long association with the county. The crown was added to the county council’s arms in 1909, and the banner subsequently entered the Registry as a public county flag. The council’s later abolition did not abolish geographic Middlesex or its identity.
The design is listed in the UK Flag Registry. A separate, securely established registration date is not given here; design dates, public unveilings and heraldic grants are different milestones.
Sources and acknowledgements
County geography follows the Historic Counties Standard, published by the Historic Counties Trust, as used by RealCounties. Read our source and status guidance.
Flag-profile text: Historic Counties Institute, CC BY-SA 3.0, drawing on the credited research. Artwork has its own credit above.

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