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Epidemiological Map

Lyme disease surveillance data by state — CDC NNDSS

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Total Confirmed Cases

41,565

CDC-reported confirmed, 2022

Total Probable Cases

21,333

Meets clinical criteria

Highest Incidence

Maine

256.8 per 100K

States Reporting

High-incidence + sentinel states

Avg Tick Habitat Score

8.1 / 10

Derived from USGS NLCD forest cover

County Lookup

Search for a specific county to view detailed Lyme incidence data

Find a County

Lyme Disease Surveillance Map

State polygons colored by incidence rate per 100,000 — deck.gl choropleth. Zoom in for CDC county-coded incidence.

Map Color Legend

Very High / High / Moderate / Low / No county-coded data / No data — see colors on the map. Amber marks absence of county coding, not a true zero.

Surveillance Signals

Derived from CDC’s published releases — incidence, thresholds, and reporting gaps

Published CDC releases

Not a live feed. CDC publishes Lyme surveillance annually. Nothing here updates between releases, and there is no real-time federal tick-borne disease stream to connect to.

State-Level Surveillance Data

Click column headers to sort. Incidence rate per 100,000 population.

Lyme disease cases and incidence rates by U.S. state, CDC NNDSS 2022. Currently sorted by incidenceRate descending.

Maine	2,168	1,387	Incidence rate: 256.8256.8 per 100K
Vermont	987	567	Incidence rate: 241.6241.6 per 100K
New Hampshire	1,456	823	Incidence rate: 164.5164.5 per 100K
West Virginia	1,234	587	Incidence rate: 102.1102.1 per 100K
Pennsylvania	8,413	4,287	Incidence rate: 98.798.7 per 100K
Delaware	643	298	Incidence rate: 93.793.7 per 100K
Wisconsin	3,456	1,789	Incidence rate: 89.289.2 per 100K
Connecticut	2,089	1,043	Incidence rate: 85.385.3 per 100K
Massachusetts	3,542	1,891	Incidence rate: 77.877.8 per 100K
Rhode Island	423	198	Incidence rate: 56.856.8 per 100K
New Jersey	3,167	1,589	Incidence rate: 52.152.1 per 100K
Minnesota	1,834	756	Incidence rate: 45.745.7 per 100K
Maryland	1,589	1,012	Incidence rate: 42.042.0 per 100K
Virginia	2,345	1,123	Incidence rate: 40.340.3 per 100K
New York	5,287	2,543	Incidence rate: 40.040.0 per 100K
Iowa	312	145	Incidence rate: 9.89.8 per 100K
District of Columbia	56	28	Incidence rate: 8.28.2 per 100K
North Carolina	356	178	Incidence rate: 5.15.1 per 100K
Ohio	345	167	Incidence rate: 4.44.4 per 100K
North Dakota	34	17	Incidence rate: 4.44.4 per 100K
Michigan	378	189	Incidence rate: 3.83.8 per 100K
South Dakota	28	14	Incidence rate: 3.13.1 per 100K
Indiana	167	78	Incidence rate: 2.52.5 per 100K
Kentucky	89	45	Incidence rate: 2.02.0 per 100K
Illinois	234	112	Incidence rate: 1.81.8 per 100K
Tennessee	78	34	Incidence rate: 1.71.7 per 100K
South Carolina	56	23	Incidence rate: 1.61.6 per 100K
Nebraska	23	12	Incidence rate: 1.21.2 per 100K
Montana	12	6	Incidence rate: 1.11.1 per 100K
Florida	156	78	Incidence rate: 1.11.1 per 100K
Wyoming	5	3	Incidence rate: 0.90.9 per 100K
Georgia	67	34	Incidence rate: 0.90.9 per 100K
Arkansas	23	12	Incidence rate: 0.80.8 per 100K
Missouri	45	23	Incidence rate: 0.70.7 per 100K
Alabama	34	17	Incidence rate: 0.70.7 per 100K
Oregon	28	14	Incidence rate: 0.70.7 per 100K
Kansas	18	9	Incidence rate: 0.60.6 per 100K
Colorado	34	17	Incidence rate: 0.60.6 per 100K
Idaho	12	6	Incidence rate: 0.60.6 per 100K
California	123	67	Incidence rate: 0.50.5 per 100K
Texas	89	45	Incidence rate: 0.50.5 per 100K
New Mexico	9	5	Incidence rate: 0.40.4 per 100K
Mississippi	12	6	Incidence rate: 0.40.4 per 100K
Louisiana	18	9	Incidence rate: 0.40.4 per 100K
Oklahoma	15	8	Incidence rate: 0.40.4 per 100K
Washington	34	17	Incidence rate: 0.40.4 per 100K
Alaska	3	2	Incidence rate: 0.40.4 per 100K
Arizona	23	12	Incidence rate: 0.30.3 per 100K
Utah	8	4	Incidence rate: 0.20.2 per 100K
Nevada	6	3	Incidence rate: 0.20.2 per 100K
Hawaii	2	1	Incidence rate: 0.10.1 per 100K

Swipe sideways to see Confirmed, Probable, and Rate columns.

County Resolution — What the Numbers Mean

Zoom past state level on the choropleth to load CDC county-coded Lyme cases joined to Census estimates.

County counts are a floor, not a total. CDC suppresses small cells; we hold residuals per state and never spread them across counties.

Each county carries its state’s county-coding completeness. Maine is above 99%. Texas is 0%.

County statistics appear here once the county layer loads.

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Data Sources (4)

Centers for Disease Control and Prevention. National Notifiable Diseases Surveillance System (NNDSS). 2018-2022.
National Oceanic and Atmospheric Administration. National Centers for Environmental Information (NCEI). 2018-2022.
U.S. Environmental Protection Agency. EnviroAtlas. 2021.
U.S. Geological Survey. National Land Cover Database (NLCD). 2021.