Siner may refer to:

• Siner, Chuvash Republic, a village in the Chuvash Republic, Russia
• Siner, Republic of Tatarstan, a settlement in the Republic of Tatarstan, Russia

• Guy Siner (born 1947), English actor
• Hosea Siner (1885–1948), American baseball player

• Sine (disambiguation)
• Sinner (disambiguation)
• Signer (disambiguation)
• Siné, French political cartoonist
• Sinar (disambiguation)
• Sinor (disambiguation)