KMRB may refer to:

• KMRB, a radio station licensed to San Gabriel, California, United States
• Eastern WV Regional Airport, serving Martinsburg, West Virginia, United States
• Korea Media Rating Board, a South Korean entertainment ratings organisation

• Sidney Sheldon's Mistress of the Game
• Sidney Shephard
• Sidney Shoemaker
• Sidney Silva Souza
• Sidney Silverman
• Sidney Simien
• Sidney Simpson
• Sidney Sinclair
• Sidney Sippe
• Sidneys Knob
• Sidney Sloane
• Sidney Smith (American football)
• Sidney Smith (disambiguation)
• Sidney Smith (football coach)
• Sidney Smith (The Gumps)
• Sidney Solomon Abrahams
• Sidney Souza
• Sidney Sperry
• Sidney Stein
• Sidney Stern, Lord Wandsworth
• Sidney Stranne
• Sidney Street, Cambridge
• Sidney Street (St. Louis)
• Sidney Sugarman
• Sidney Tafler