Talkers differ in phonetic properties of speech. One such property is voice-onset-time (VOT), an important marker of the voicing contrast in English stop consonants. Research has shown that VOT is affected by speaking rate: for any given talker, VOT increases as rate slows. The current work examines whether this contextual influence varies across talkers. Many tokens of /ti/ (Experiment 1) or /pi/ and /ki/ (Experiment 2) were elicited from talkers across a range of rates. VOT and syllable duration were measured for each token. The results showed that although VOT increased as rate slowed for all talkers, the extent of this increase varied significantly across talkers. For a given talker, however, the extent of the increase was stable across a change in place of articulation. These findings suggest that talker differences in phonetic properties of speech reflect talker-specific contextual influences.