To assess seasonal and 2009 H1N1 influenza vaccination coverage among pregnant women, supplemental questions were added to the PRAMS survey. During the 2009-10 influenza season, 30 states agreed to participate in the supplemental influenza assessment. For this analysis, 10 states† were selected that submitted their data to CDC by September 15 and had a response rate ≥65%. Included in this analysis were 6,225 women with non-missing data regarding seasonal influenza vaccination who had live births during September 1, 2009–March 12, 2010, and 5,112 women with non-missing data regarding 2009 H1N1 vaccination who had live births during October 1, 2009–March 12, 2010. In addition, to compare seasonal and 2009 H1N1 vaccination coverage within the same sample of women, data for the 5,052 women with complete data for both vaccinations who had live births during October 1, 2009–March 12, 2010, were analyzed. The 2009 H1N1 vaccination became available on October 5, 2009.