A non-toxic insect repellent formulation utilizing a plurality of all natural active components in solution has been proven to be effective in repelling mosquitoes for periods of between six to eight weeks, with one application. The insect repellent formulation includes a plurality of natural, essential oils in an aqueous solution comprising at least one emulsifying agent to maintain the oils in a stable solution. A pH conditioning agent may be added to assure the formulation is pH balanced for application to grass, plants, and trees, without detriment. At least one formulation includes a buoyancy agent such that the formulation floats on or at the surface of water bodies in an area of application, thereby suffocating any insect larvae as may be present there. The formulation may be provided as either a concentrate, or at dilutions ready for direct application, and may be applied by any of a variety of methods including broadcast spraying, boom applicators, misting systems, etc.