A leading polling firms in the United States and the official North American and South American political polling agency for Reuters.

On-line public opinion research firm specializing in database surveys.

public opinion research organization located in Guilford, Connecticut offering political polling and marketing research.

A national Republican polling firm, providing polls, election information, and related services.

Conducts interactive, fast-turn, affordable public opinion polls and private market research for the nation's most discriminating clients.

A survey research company specializing in political and election surveys, litigation services, church and religious organizational surveys and media research.

A public opinion, market research and political consulting firm specializing in polling for Republican candidates, corporations and interest groups.

National political and public opinion polling firm which provides public opinion research and strategies.

Olney, Maryland-based polling and research firm specializing in U.S. state and local elections. Staff and company profiles, op-eds, media citations, and poll result archives included.

a national Republican political and public affairs research firm with its roots in political campaigns, its research is focused on producing information that drives decisions and results.

Providing opinion research and polling for candidates, organizations, and governments in the US and worldwide. Capabilities include focus groups, face-to-face interviews, and telephone surveys.

A full-service market research, public affairs and political consulting firm with offices in Washington and San Francisco.

A California-based, Latino-owned firm specializing in political polling, strategic research and communications.

Full-service market research firm in energy/utility, associations, ballot measure, health care, education, and other areas.

provides public opinion research for campaigns and corporations across the United States. Facilities located in Portland Oregon.

An international survey research and strategic services company, specializing in public opinion polls, market research, strategic consulting services, and media buying.

A major US political polling firm specializing in state polls.

A national firm that has provided accurate and cost-effective public opinion polling and market research since 1988 to political campaigns, corporations, schools, law firms, and associations.

Boulder, Colorado, political polling, PR research, market research, and strategic consulting firm which offers strategies for positioning, messaging, marketing, and targeting.

Offices in Washington, DC and Femandina Beach, FL. Clients include political parties, candidates, media, issues advocacy, referenda, and major corporations.