An insect repellent composition containing citronella oil, D-limonene, 2 or more synergists, and 3 or more essential oils as the active ingredients. The preferred essential oils are geranium oil, rosemary oil and peppermint oil, but other essential oils may be used. In the preferred embodiment the synergists are aldehyde C-14 and aldehyde C-18. As desired, vanillin may be used as a stabilizer, and fragrances, fragrance enhancers and surfactants may be utilized.