Organizations that focus on public opinion polls, politics and voting trends include:
A small selection of think tanks and university-affiliated research centers that may be relevant to your projects include:
Commercial (subscription-based) sources
National demographic analysis and lifestyle trends
Social Explorer [a TCNJ subscription database]: provides quick and easy access to modern and historical U.S. Census data and demographic information, including data on crime, economics, elections, health, and religion.
Experian: Simmons National Consumer Survey and National Hispanic Consumer Survey; also New Media. [Select "Resources" from the menu at the top of the page for a user guide and other helpful information.]
Local-area demographic analysis and lifestyle trends
Claritas 360 (from SRDS): offers demographic and market segmentation data of consumers by focusing on a variety of lifestyle and behavior descriptions.
Free online resources
U.S. Census: age, ethnicity, income, educational attainment, etc.
State and County QuickFacts - includes statistics for all states and counties, and for cities and towns with more than 5,000 people.
Census 2010 Interactive Population Map - details about population, age, race/ethnicity and housing status, for counties and subdivisions within counties.
American Community Survey - includes updates and projections since the decennial census.
Sample search -- Educational attainment in Trenton:
American FactFinder (U.S. Census Bureau - "Your source for population, housing, economic, and geographic information". Search for data from the comprehensive decennial census (latest = 2010) as well as samples and projections from data collected annually. For help, see Using FactFinder.
EasiDemographics / this is mostly a fee-based service, but look for the link at the top of the page to free reports, ring studies, maps, and more -- based on 2010 US Census data [a brief registration form is required]
The New Jersey Data Book: "Published as a free public service by Rutgers' Center for Government Services (CGS), the New Jersey Data Book includes statistics on New Jersey’s 565 municipalities, its legislative districts, counties, schools, elections, and people." Note that in order to access the data, one-time registration (free) is required for first-time users. Earlier editions of this resource (before the print version ceased) are available in print in TCNJ Library.
New Jersey State Data Center: a faster path to NJ-based statistics (at the state-, county-, municipal- or zipcode-level), mostly sourced from US Census data.