This article provides a perceptual dialectology account of linguistic diversity in Saudi Arabia. Using the map-drawing and labeling task, the study examined the perceptions and ideologies of 674 speakers of Saudi Arabic dialects about the perceived boundaries of regional dialect varieties, as well as their social evaluation of and beliefs about the dialects. The analysis of the results as displayed in composite maps using a Geographic Information System (GIS) mapping program revealed that respondents identified five major dialect areas as having the most distinct features: the Najdi, Hijazi, southern, eastern, and northern regions. Ten categories of respondents’ labels emerged out of the qualitative analysis: style , influence , Bedouin/urban , fast , open/closed , vowel lengthening , unique vocabulary , alternation of /k/ and /g/ , attraction , and social media . The present findings show the salience of certain linguistic and social features that respondents associate with certain dialect areas. Such perceptions can ultimately guide and enhance future descriptions and analyses of actual linguistic variation in Saudi Arabia.