Category:Members of the British House of Lords by party

• Hereditary members of the British House of Lords by party‎ (8 C)

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• Life peers by party‎ (12 C)

A

• Alliance Party of Northern Ireland peers‎ (3 P)

C

• Conservative Party (UK) peers‎ (3 C)
• Crossbench peers‎ (2 C)

L

• Labour Party (UK) peers‎ (4 C)
• Liberal Party (UK) peers‎ (3 C)
• Liberal Democrats (UK) peers‎ (2 C)
• Liberal Unionist Party peers‎ (27 P)

S

• Social Democratic Party (UK) peers‎ (2 C)
• Social Democratic Party (UK, 1988–1990) peers‎ (18 P)

U

• UK Independence Party peers‎ (2 C)
• Ulster Unionist Party peers‎ (2 C, 1 P)
• Ultra-Tory peers‎ (3 P)