Liniers may refer to:

• Liniers, a barrio (neighborhood) of Buenos Aires, Argentina
• Liniers, Vienne, a commune in the Vienne department, France
• Santiago de Liniers, 1st Count of Buenos Aires, a French officer in Spanish service, viceroy of the Spanish colony of Río de la Plata
• Liniers (cartoonist), an Argentine cartoonist

• Sidney O. Smith, Jr.
• Sidney Owen
• Sidney Parker (disambiguation)
• Sidney Patrick Shelley
• Sidney Peel
• Sidney P. Epes
• Sidney Perley
• Sidney Pestka
• Sidney Phillips
• Sidney (Pokemon)
• Sidney Pothecary
• Sidney Potier
• Sidney Psalms
• Sidney Pullen
• Sidney Radley-Walters
• Sidney Rand
• Sidney Rand (ambassador)
• Sidney Rand (disambiguation)
• Sidney Rand (rower)
• Sidney Reso
• Sidney R. Garfield
• Sidney Ribeau
• Sidney Richard Percy
• Sidney Rielly
• Sidney Robert Fremantle