STD Rates in New Castle County, Delaware
2023 CDC surveillance data for New Castle County, Delaware — chlamydia, gonorrhea, and syphilis rates with state comparisons.
New Castle County recorded a combined STD rate of 814.6 per 100,000 residents in 2023, ranking 2nd of 3 counties in Delaware. Reported infections included chlamydia at 610.6 per 100,000 (3,533 cases, 10% above the state rate), gonorrhea at 184.1 per 100,000 (1,065 cases, 21% above the state rate), syphilis at 19.9 per 100,000 (115 cases, 14% above the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. New Castle County has confidential testing locations available.
STD Trends in New Castle County, 2000–2023
Reported cases per 100,000 residents each year, against the Delaware rate (dashed). In a county this size a handful of cases moves the rate a long way, so read the shape rather than any single year.
Source: CDC NCHHSTP AtlasPlus county surveillance, 2000–2023.
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New Castle County vs Delaware and the US
| Infection | New Castle County | Delaware | US | vs Delaware | vs US | Rank in Delaware |
|---|---|---|---|---|---|---|
| Chlamydia | 610.63,533 cases | 552.7 | 490.7 | 10.5% above | 24.4% above | 2nd of 3 |
| Gonorrhea | 184.11,065 cases | 151.9 | 178.2 | 21.2% above | 3.3% above | 1st of 3 |
| Syphilis (P&S) | 19.9115 cases | 17.4 | 15.8 | 14.4% above | 25.9% above | 1st of 3 |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among Delaware’s counties. The US rate is all 50 states combined. Comparisons are left out where fewer than 20 cases were reported, because a rate built on so few cases can swing widely from one year to the next.
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