Maryland COVID-19 Cumulative County Case Counts

Maryland data provides the cumulative number of positive COVID-19 cases among residents by county jurisdiction. The dataset was published by the State of Maryland but is deprecated as of October 10, 2025, with updates having shifted from daily to weekly in April 2023.

Use Cases

• Analyze cumulative case trends across Maryland counties like Baltimore City, Anne Arundel, and Carroll for public health reporting.
• Model the spatial spread of COVID-19 using county-level case data to identify regional hotspots.
• Assess case burden disparities between jurisdictions such as Cecil, Dorchester, and Calvert counties.

Strengths

• Data originates from the authoritative State of Maryland Department of Health.
• Covers multiple Maryland jurisdictions including Baltimore City and 23 listed counties.
• Available in multiple machine-readable formats including CSV, JSON, and XML.

Limitations

• Dataset is deprecated and no longer updated, limiting analysis to historical periods only.
• Update frequency reduced from daily to weekly in April 2023, decreasing temporal granularity for later data.
• Specific row counts, column details, and sample data are unavailable for assessing scope and structure.

Provenance

Source

State of Maryland

Collection Method

Positive test results reported daily by local health departments via the ESSENCE system.

Time Range

null

Freshness

Deprecated as of October 10, 2025; last recorded update was 2025-10-18.

Geography

Maryland, United States (county-level jurisdictions)