In this paper, outage performance of hybrid satellite-terrestrial relaying networks using rateless codes (RCs) is evaluated via both simulation and analysis. In the proposed scheme, a satellite (S) transmits encoded packets to a group of terrestrial users (U) with help of a terrestrial station (R). The terrestrial users are suffered from co-channel interference, and they must receive a sufficient number of the encoded packets for the data recovery. This paper analyzes outage probability (OP) at each user and system outage probability (SOP) defined as probability that one of the users cannot collect enough encoded packets after the transmission ends. This paper also investigates impact of number of the users, number of the interference sources, and number of the data transmission of the satellite on the OP and SOP performance.