Osro may refer to:

• Osro Cobb (1904–1996), American lawyer, politician, and jurist
• Osro, Kansas, United States, unincorporated community

• Isotopes in medicine
• Isotopes of unbiseptium
• Isotopes of ununhexium
• Isotopes of Ununpentium
• Isotopes of ununquadium
• Isotopes of Xenon
• Isotopes Punk Rock Baseball Club
• Isotope study
• Isotopic analysis by nuclear magnetic resonance
• Isotopic date
• Isotopic dilution
• Isotopic figure
• Isotopic indicator
• Isotopic multiplet
• Isotopic number
• Isotopic ratio outlier analysis
• Isotopic Ratio Outlier Analysis
• Isotopic Ratio Outlier Analysis (IROA)
• Isotopic Ratio Outlier Analysis (IROA®)
• Isotopic signatures
• Isotopic substitution
• Isotopy of algebras
• Isotopy of an algebra
• Isotov GTD-350
• Isotov TV2-117