The Census Bureau produces national estimates of health insurance coverage in its reports of official poverty statistics.  Tables and figures provide information on insurance coverage and the uninsured with demograohic and socio-economic breakdowns. 

Frequency and Timespan: Annual data avalable from 1999 (for health insurance) to the present

Geographic Level of Coverage: National with some regional breakdowns

Publications and Tables are available online

Source: U.S. Census Bureau. Health Insurance Data. Accessed 2/21/2012

The Census Bureau’s Small Area Health Insurance Estimates (SAHIE) program produces estimates of health insurance coverage for states and all counties.

Frequency and Timespan:  Annual data available from 2000 to the present

Geographic Level of Coverage: State and county

Publications and Tables are available online

Source: U.S. Census Bureau. About SAHIE. Accessed 2/21/2012