Data was sought from all wineries producing more than 10,000 cases per year across all of California wine regions. 219 such wineries were identified yielding a representative sample of 106 producers across the state. Women were found to represent 38.1% of all leadership roles in the industry. As wineries grow larger, the percentage of women tends to decline. Women tend to be over-represented in staff roles and under-represented in line positions, which is consistent with other US industry. California’s wine industry has made significant progress in bringing women into management roles in the industry. Recommendations are offered for further improvement.