The Primrose League was an organisation for spreading Conservative principles in Great Britain. It was founded in 1883.

At a late point in its existence, its declared aims (published in the Primrose League Gazette, vol. 83, no. 2, March/April 1979) were:

The primrose was known as the "favourite flower" of Benjamin Disraeli, and so became associated with him. Queen Victoria sent a wreath of primroses to his funeral on 26 April 1881 with the handwritten message: "His favourite flowers: from Osborne: a tribute of affectionate regard from Queen Victoria". On the day of the unveiling of Disraeli's statue all Conservative members of the House of Commons were decorated with the primrose.

A small group had for some time discussed the means for obtaining the support of the people for Conservative principles. Sir Henry Drummond Wolff said to Lord Randolph Churchill, "Let us found a primrose league". A meeting was held at the Carlton Club shortly afterwards, consisting of Churchill, Wolff, Sir John Gorst, Percy Mitford, Colonel Fred Burnaby and some others, to whom were subsequently added Satchell Hopkins, J. B. Stone, Rowlands and some Birmingham supporters of Burnaby, who also wished to return Lord Randolph Churchill as a Conservative member for that city. These founding members assisted in remodelling the original statutes, first drawn up by Wolff. Wolff had for some years perceived the influence exercised in benefit societies by badges and titular appellations, and he endeavoured to devise some quaint phraseology that would be attractive to the working classes. The title of "Knight Harbinger" was taken from an office no longer existing in the Royal Household, and a regular gradation was instituted for the honorific titles and decorations assigned to members. This idea, though at first ridiculed, was greatly developed since the foundation of the order; and new distinctions and decorations were founded, also contributing to the attractions of the league.

I declare on my honour and faith that I will devote my best ability to the maintenance of religion, of the estates of the realm, and of the imperial ascendancy of the British Empire; and that, consistently with my allegiance to the sovereign of these realms, I will promote with discretion and fidelity the above objects, being those of the Primrose League.

The motto was Imperium et libertas; the seal, three primroses; and the badge, a monogram containing the letters PL, surrounded by primroses. Many other badges and various articles of jewellery were designed later, with this flower as an emblem.

A small office was first taken on a second floor in Essex Street, The Strand, but this had soon to be abandoned, as the dimensions of the League rapidly increased. The league had two types of members who paid different annual subscriptions: full members (knights and dames) who were usually charged half a crown, and associate members who paid a few pence.

Ladies were generally included in the first organisation of the League, but subsequently a separate Ladies Branch and Grand Council were formed. The founder of the Ladies Grand Council was Lady Borthwick (afterwards Lady Glenesk), and the first meeting of the committee took place at her house in Piccadilly in March 1885. "The Primrose League was the first political organisation to give women the same status and responsibilities as men". The ladies who formed the first committee were: Lady Borthwick; the Dowager Duchess of Marlborough (first lady president); Lady Wimborne; Lady Randolph Churchill; Lady Charles Beresford; the Dowager Marchioness of Waterford; Julia, Marchioness of Tweeddale; Julia, Countess of Jersey; Mrs (subsequently Lady) Hardman; Lady Dorothy Nevill; the Honorable Lady Campbell (later Lady Blythswood); the Honorable Mrs Armitage; Mrs Bischoffsheim and Meresia Nevill (the first secretary of the Ladies Council).