U.S. County-Level Mortality, Natality, and Disease Data via API

1970-2026 data from the CDC WONDER API includes county-level Compressed Mortality since 1979, Natality since 1995, and population estimates since 1970. The system aggregates death certificates, birth certificates, and disease case reports from multiple public health surveillance programs. It is maintained by the U.S. Department of Health & Human Services.

Use Cases

• Analyze county-level Compressed Mortality trends over time to study geographic disparities in causes of death.
• Investigate correlations between county-level Natality data and population estimates for demographic modeling.
• Track state-level Sexually Transmitted Disease Morbidity case reports for epidemiological surveillance and outbreak detection.
• Link county-level Linked Birth/Death records to study infant mortality and associated maternal factors.

Strengths

• Provides long-term temporal coverage, with some data series beginning in 1970.
• Aggregates data from multiple authoritative U.S. public health surveillance systems.
• Offers data at granular geographic levels, including county, state, and metro areas.

Limitations

• Specific row counts, column definitions, and sample data are unavailable for review.
• Data is accessed via API only, which may require technical integration effort compared to flat files.
• The description lists many distinct data systems, which may have inconsistent structures or update schedules.

Provenance

Source

U.S. Department of Health & Human Services, Centers for Disease Control and Prevention (CDC).

Collection Method

Aggregated from official U.S. public health surveillance systems and vital statistics.

Time Range

1970 to present, with specific series starting between 1970 and 1999.

Freshness

The API metadata was last updated in March 2026, indicating active maintenance.

Geography

United States, primarily at county and state levels, with some metro-level data.