We have carried out a detailed identification of radio sources from the FIRST catalog lying within the Abell radii of 26 rich galactic clusters with optical objects in the APM and DSS surveys. Of the 326 radio sources in the cluster fields, 99 are identified, 40 have probable identifications, and 187 are unidentified. Among these last sources, 20 are definitely located in the clusters and 34 are cluster members with high probability. Thus, ≈30-40% of the FIRST radio sources could be identified using APM and DSS data, and, on the average, there were two sources in each cluster.