American Community Survey (ACS) provides data every year and includes topics that include education, transportation, housing and ancestry.

CIS is a non-profit think tank devoted to research and policy analysis of the economic, social, demographic, fiscal, and other impacts of immigration on the US.

Includes the annually updated World Population Data Sheet and PRB's extensive database.

Esri's Tapestry™ Lifestyle Segmentation classifies the US population into 67 market segments and provides comprehensive lifestyle details.

The Demographic and Health Surveys (DHS) program has collected, analyzed and disseminated accurate and representative data on population, health, HIV, and nutrition through more more that 200 surveys in over 75 countries. You must register in order to download data.

EconData.Net is designed to help practitioners, researchers, students, and other data users quickly gain access to relevant state and substate socioeconomic data. The site aims to be a convenient, comprehensive first stop for anyone searching among the vast, disparate array of public and private data sources on the Web

The Migration Policy Institute is an independent, nonpartisan, nonprofit think tank in Washington, DC dedicated to analysis of the movement of people worldwide.

The Population Reference Bureau informs people around the world about population, health, and the environment, and empowers them to use that information to advance the well-being of current and future generations.

WomanStats Database - "the world's most comprehensive compilation of information on the status of women."