We present an ant and spider species list from five localities of the Metropolitan Region of Salvador (MRS). The MRS is placed in an Atlantic Forest area classified as dense broadleaf forest, considered to be of high biological importance and priority for conservation. We determined 198 species of ants (8 of these are considered to be synanthropic and/or exotic), distributed across nine subfamilies. We determined 164 species of spiders (14 of them being synanthropic and/or exotic), distributed across thirty families. Therefore, this survey shows that the urban environment of the MRS still harbors a large number of native fauna species.