HOWARD DELAFIELD INTERNATIONAL (HDI) is an international marketing and communications consulting firm with headquarters in Washington, DC.

Established in 1995, HDI has designed and implemented communication and marketing interventions on behalf of foreign aid agencies, non-profit organizations, private sector companies and developing country governments whose missions include promoting health, environmental conservation, and economic and market development. HDI's international health experience is primarily in the fields of HIV/AIDS, maternal and child health, family planning, child survival, primary health care, and health insurance.