The 2008 ASD research funding portfolio analysis is the first comprehensive review of ASD research funding across both the public and private sector and provides a valuable snapshot of the current funding landscape. This initial analysis will serve as the baseline for future analyses of ASD research funding to be conducted annually as part of the updating process for the IACC Strategic Plan for Autism Spectrum Disorder Research. Trends identified during the analysis can be used to address underfunded areas, identify new research opportunities and priorities, and guide the direction of future research.