The invention provides a composition for forming a silica layer, a silica layer and method for manufacturing the same, and electronic device including the silica layer. The composition for forming a silica layer includes a silicon-containing polymer and a compound represented by chemical formula 1 as a solvent. In chemical formula 1, L<1>, L<2>, m, n, X<1>, and X<2> are the same as defined in the specification. The composition for forming a silica layer that may minimize generation of defects in a layer and ensure suitable coating properties.