This study investigated syllable duration as a measure of speech rhythm in the English spoken by Hong Kong Cantonese speakers. A computer dataset of Hong Kong English speech data amounting to 4,404 syllables was used. Measurements of syllable duration were taken, investigated statistically, and then compared with measurements of 1,847 syllables from an existing corpus of British English speakers. It was found that, although some similarities existed, the Hong Kong English speakers showed smaller differences in the relative syllable duration of tonic, stressed, unstressed, and weakened syllables than the British English speakers. This result is discussed with regard to potential intelligibility problems, features of possible language transfer from Cantonese to English with respect to speech rhythm, and implications for language teaching professionals. (Contains 5 tables and 2 figures.)