The Uninsured by Race/Ethnicity

'The uninsured are more likely to be white than other races or ethnicities, comprising about half of the uninsured population (48%).(6)

However, the uninsured are disproportionately Hispanic to a significant degree. Hispanics represent 14% of U.S. residents but comprise 30% of the uninsured.
The higher uninsured rate for Hispanics is not associated with higher poverty levels than other groups — the poverty rate for Hispanics is slightly lower than for African-Americans, 22.2% vs. 24.9% respectively.
Rather, research has shown that Hispanics are more likely to be employed in jobs that do not offer health insurance, such as construction and agriculture (but when offered health insurance they accept at the same rates at whites and blacks).(7)

From Overview of the Uninsured in the United States:

includes figures on
The Demographics of the Uninsured
The Uninsured by Income
The Uninsured by Age
The Uninsured by Parental Status
The Uninsured by Race/Ethnicity
The Uninsured by Work Status
The Uninsured by Citizenship Status
The Uninsured by Firm Size