In the British Isles and parts of the Commonwealth, the May Queen or Queen of May is a personification of the May Day holiday of 1 May, and of springtime and the coming growing season. The May Queen is a girl who rides or walks at the front of a parade for May Day celebrations. She wears a white gown to symbolise purity and usually a tiara or crown. Her duty is to begin the May Day celebrations. She is generally crowned by flowers and makes a speech before the dancing begins. Certain age-groups dance around a Maypole celebrating youth and springtime.

In 1922 James George Frazer speculated that the figure of the May Queen was linked to ancient tree worship.

In the High Middle Ages in England the May Queen was also known as the "Summer Queen". George C. Homans points out: "The time from Hocktide, after Easter Week, to Lammas (1 August) was summer (estas)."

In 1557, a London diarist called Henry Machyn wrote:

"The xxx day of May was a goly May-gam in Fanch-chyrchestrett with drumes and gunes and pykes, and ix wordes dyd ryd; and thay had speches evere man, and the morris dansse and the sauden, and an elevant with the castyll, and the sauden and yonge morens with targattes and darttes, and the lord and the lade of the Maye".

Modern English: On the 30 May was a jolly May-game in Fenchurch Street (London) with drums and guns and pikes, The Nine Worthies did ride; and they all had speeches, and the morris dance and sultan and an elephant with a castle and the sultan and young moors with shields and arrows, and the lord and lady of the May".

Many areas keep this tradition alive today. Whilst exact records are often unavailable, a number of celebrations have unbroken records (with some known breaks for world wars and COVID-19) spanning over 100 years. These include:

YOU must wake and call me early, call me early,
     mother dear;
To-morrow 'll be the happiest time of all the glad
     new-year, -
Of all the glad new-year, mother, the maddest,
     merriest day;
For I'm to be Queen o' the May, mother, I'm to
     be Queen o' the May.

I sleep so sound all night, mother, that I shall
     never wake,
If you do not call me loud when the day begins
     to break;
But I must gather knots of flowers and buds,
     and garlands gay;
For I'm to be Queen o' the May, mother, I'm to
     be Queen o' the May.

Little Effie shall go with me to-morrow to the
     green,
And you'll be there, too, mother, to see me made
     the Queen;
For the shepherd lads on every side 'll come from
     far away;
And I'm to be Queen o' the May, mother, I'm to
     be Queen o' the May.

The night-winds come and go, mother, upon the
     meadow-grass,
And the happy stars above them seem to brighten
     as they pass;
There will not be a drop of rain the whole of the
     livelong day;
And I'm to be Queen o' the May, mother, I'm to
     be Queen o' the May.

All the valley, mother, 'll be fresh and green and
     still,
And the cowslip and the crowfoot are over all the
     hill,
And the rivulet in the flowery dale 'll merrily
     glance and play,
For I'm to be Queen o' the May, mother, I'm to
     be Queen o' the May.