Wireless communication is susceptible to radio and jamming attacks, which prevent the reception of communications. Most existing anti-jamming work does not consider the location information of radio interferers and jammers. However, this information can provide important insights for networks to manage its resource and to defend against radio interference. In this paper, we explore methods to localize radio interferers in wireless networks. We first exploit the feasibility of using two existing range-free localization algorithms, Centroid Localization (CL) and Weighted Centroid Localization (WCL), to localize the position of the jammer. We then develop novel algorithm, Virtual Force Iterative Localization (VFIL), which estimates the location of a jammer iteratively by utilizing the network topology. Our extensive simulation results have demonstrated that VFIL is less sensitive to node densities and can achieve higher accuracy when localizing the jammer's position compared with centroid-based approaches.