We analyze the $\gamma p\to K^0{\Sigma }^{+}$ process in the resonance region within the framework of isobar model. The amplitude is constructed as a sum of tree-level Feynman diagrams with the addition of the contact current ensuring gauge invariance of the total amplitude. The resonance content of our models is inspired by a model for the isospin-related $K^{+}{\Sigma }^0$ channel. The main coupling constant in the $K\Sigma N$ vertex is estimated with help of isospin symmetry and the rest of the free parameters (resonance couplings and hadronic form-factors cutoffs) are calibrated to the available $K^0{\Sigma }^{+}$ data. Using the resulting models, we calculate the differential and total cross sections, as well as polarization observables ($P$, $\Sigma$, $T$, $O_x$, $O_z$), and compare them with measurements. We identify the $N(1720)3/2^{+}$ and $N(1900)3/2^{+}$ states as the most important ones for good correspondence with the experimental data.