Quechua is an indigenous language of the Andes region of South America. In Cochabamba, Bolivia, Quechua and Spanish have been in contact for over 500 years. In this thesis, I explore sociolinguistic variation among bilingual speakers of Cochabamba Quechua (CQ) and Spanish by investigating the relationship between the production of the voiceless uvular stop /q/ and speakers’ sociolinguistic backgrounds. I conducted a speech production study and sociolinguistic interview with seven bilingual CQ-Spanish speakers. I analyzed manner of articulation and place of articulation variation. Results indicate that manner of articulation varies primarily due to phonological factors, and place of articulation varies according to sociolinguistic factors. This reveals that among bilingual CQ-Spanish speakers, production of voiceless uvular stop /q/ does vary sociolinguistically