Margaret Lucas may refer to:

• Margaret Bright Lucas, suffragist
• Margaret Cavendish, Duchess of Newcastle-upon-Tyne, née Lucas, writer, scientist and aristocrat

• Florínia
• Florø Church
• Florø Radio
• Flos adonis
• Flos (book)
• Floscopa scandens
• Floscularia ringens
• Flos (disambiguation)
• Flosmutisia paramicola
• FL/OSS
• F/L/OSS
• Flossach
• Floss Guppy
• Flossie Bailey
• Flossie Chidyaonga
• Flossie Floyd Green Elementary
• Flossie Gomile-Chidyaonga
• Flossie's
• Flossmoor (Metra)
• Floss (musical)
• Floss (river)
• Floss silk
• Flo-Sun
• FLO-SUN
• Flot.