Bureau of Labor Statistics provides a wide range of data and information related to labor statistics.

Department of Labor (DOL) administrates and enforces over 180 federal statutes that cover a wide variety of workplace activities.

Office of Administrative Law Judges: Dictionary of Occupational Titles (DOT)

Occupational Outlook Handbook describes over 200 occupations with the following information: nature of work, working conditions, employment, training, advancement, job outlook, earnings, and related occupations.

Office of Employment Projections develops information about the nation's labor market for 10 years in the future. Labor force trends by sex, race, and age. Employment trends by industry and occupation. Standard Occupational Classifications (SOC) classifies workers into occupational categories.

Occupational Employment and Wage Estimates lists occupational employment and wage estimates for the nation, states and metropolitan Areas.

Occupational Employment Statistics (OES)
The Occupational Employment Statistics (OES) program produces employment and wage estimates for over 700 occupations. These are estimates of the number of people employed in certain occupations, and estimates of wages paid to them. These estimates are available for the nation as a whole, for individual states, and for metropolitan areas; national occupational estimates for specific industries are also available.

Secretaria del Trabajo y Prevision Social (STPS)
Employment and wage estimates based on geographical areas.

California Occupation Guides alphabetical list of occupations, including duties, outlook, wages, benefits, training.

EDD Labor Market Information Home Page which lists occupation employment & wage data links by geographical areas of the entire state.

EDD Occupational Outlook Reports for future employment statements. The reports contain summarized local information on various occupations by county. They include wages, employer benefits, skills, education, training and experience requirements, worker supply and demand assessments, advancement potential, occupational projections, employment trends, and recruitment.

Department of the Interior: Vocational Exploration and Temperament Test provides information about specific careers, including job duties, working conditions, wages, educational and/or licensing requirements, and employment outlook.