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Reports of Lyme Disease in Rockingham County, New Hampshire

6,223

Confirmed cases of Lyme disease in Rockingham County (2000 to 2020).

Ranked #1 of 10 counties in New Hampshire. That's 30.5% of New Hampshire's 20,388 confirmed cases.

Yearly Breakdown of Lyme Cases in Rockingham County

Confirmed cases reported to the CDC each year.
View as a table
Confirmed Lyme disease cases in Rockingham County by year
Year Confirmed cases
2000 31
2001 59
2002 115
2003 78
2004 103
2005 129
2006 310
2007 395
2008 671
2009 582
2010 500
2011 422
2012 546
2013 523
2014 222
2015 142
2016 257
2017 317
2018 351
2019 415
2020 55
2000–2020
Confirmed cases
    Rockingham County

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    Lyme Stats for Other New Hampshire Counties

    Confirmed Lyme disease cases by county in New Hampshire, 2000 to 2020
    County Confirmed cases Share of state
    Rockingham County 6,223 30.5%
    Hillsborough County 4,957 24.3%
    Strafford County 2,324 11.4%
    Merrimack County 1,828 9.0%
    Grafton County 668 3.3%
    Carroll County 607 3.0%
    Cheshire County 602 3.0%
    Belknap County 521 2.6%
    Sullivan County 354 1.7%
    Coos County 85 0.4%
    Unknown County 2,219 10.9%

    "Unknown County" counts cases the CDC confirmed in New Hampshire without a county of residence. They are included in the state total but not on the map.

    Data Sources

    All Lyme disease prevalence data sourced from the Centers for Disease Control and Prevention's surveillance data. Cases are counted by the patient's county of residence, which may not be where the tick bite occurred.

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