Subjective frequency and imageability estimates for a sample of 3,600 French nouns were collected from two independent groups of 72 young adults each. Both groups received standard instructions and provided their ratings on a 7-point scale. The timing, sequencing, presentation of lexical stimuli, and recording of responses were controlled by a computer. All estimates of internal consistency and test-retest reliability (> or =.98) confirm the high level of precision and reliability of the ratings. Correlations with ratings drawn from similar studies were found to be positive and significant for subjective frequency (r > or = .85) and for imageability (r > or = .69). Subjective frequency was positively and significantly correlated with objective frequency estimates drawn from 10 different sources (r > or = .42). Subjective frequency and imageability were significantly correlated (r = .26), a relationship that was driven primarily by a sudden drop in imageability ratings for words with a subjective frequency rating below 2.5. The methodological implications of these findings are discussed. The ratings can be downloaded as supplemental materials from brm.psychonomic-journals.org/content/supplemental.