Within the present study, we assess the sociolinguistic vitality of Romeyka, the only Asia Minor Greek variety, which, albeit endangered, is still spoken in the Black Sea region, Turkey (historically known as Pontus), by means of nine extralinguistic (i.e. sociological) and sociolinguistic factors, specially tailored for the situation of Romeyka. Our current vitality assessment addresses an Istanbulite community, although the results will be compared against a rural community in the Black Sea, namely 'Anasta' (Sitaridou 2013). We used the direct approach to conduct an attitudinal survey with 27 participants -the first of its kind for Romeyka-which allows us to track the interrelation of vitality factors. The most relevant factors for Romeyka's vitality were shown to be: (i) Turkish language policies and education; (ii) identity function of the language; and (iii) language competence. These factors were found to affect language vitality by influencing language attitudes. Furthermore, as an often-neglected factor, the language of data elicitation was taken into account in how it affects the answers of respondents. The following variables were also found to have an effect: (iv) age of the respondents, (v) gender, (vi) speech community; the latter is argued to constitute the most crucial factor for Romeyka's vitality.