In response to dramatically increasing adoption in consumer markets, the National Organic Program (NOP) initiated novel labeling standards for food products in the U.S. in 2002. This program is a particularly relevant standardization effort for multi-ingredient processed foods. Rather than a simple binary message (organic or not), gradations of organic content are now codified. No existing published study evaluates consumer willingness to pay or motivation to purchase in response to such a rich organic label. This article presents evidence of the impact of the NOP through analysis of data collected in seven central Ohio, USA grocery stores. Results suggest that consumers are willing to pay premium prices for organic foods, even those with less than 100 percent organic ingredients. The magnitudes of WTP premia varied significantly among consumer groups, suggesting that targeted marketing may be effective for organic merchandisers.