Despite public support, environmental education (EE) is rarely a priority for funders, even those interested in the environment or education. We examined reasons behind the paucity of EE funding, focusing on U.S. foundations, which are one of the largest sources of support for environmental efforts. We analyzed historical giving data and interviewed a dozen funders. Over the 2003 to 2007 period, we found EE funding represented approximately 5% of overall environment funding in the United States. Reasons for the low level of EE support included definitional complexity, uncertainty about efficacy, and inclusion of EE funding within issue-specific grants, such as those focused on climate change. (Contains 3 notes, 4 tables, and 2 figures.)