Improved aqueous, alkaline hard surface cleaning compositions useful in the cleaning of hard surfaces, particularly hard surfaces bearing greasy stains or soils also provide a disinfecting and/or sanitizing benefit to the treated hard surfaces. Preferred compositions comprise amine oxide as the sole surfactant constituent, an alkalinity constituent, preferably an alkanolamine and as the sole organic solvent constituent, an alkylene glycol phenyl ether, an antimicrobially active constituent, and water, optionally further including a dye and/or fragrance composition. The compositions provide excellent cleaning of greasy soils on hard surfaces and provide a disinfecting or sanitizing benefit thereto.