Normal toric varieties over a field can be described by combinatorial data, so called rational fans. Mumford did extend this description to normal toric schemes of finite type defined over a discrete valuation ring. We present a generalization of these results for normal toric schemes of finite type defined over a non-necessarily discrete valuation ring of rank one. We start with the affine case by giving a classification in terms of some admissible cones. For the non-affine case the main step is to generalize Sumihiro's theorem for normal toric varieties to this context. Since our schemes are non-noetherian in general, this is done by applying intersection theory with divisors on admissible formal schemes over rank one valuation rings...