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Historical Markers in Riverhead
Riverhead is the county seat for Suffolk County
Riverhead is in Suffolk County
ADJACENT TO SUFFOLK COUNTY Greater Bridgeport Region, Connecticut (171) ► South Central Region, Connecticut (545) ► Southeastern Region, Connecticut (490) ► Washington County, Rhode Island (141) ►
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| On East Main Street, on the right when traveling east. |
| Near Sound Avenue east of Herricks Lane, on the left when traveling east. |
| On W Main Street (New York State Route 25) 0.4 miles east of Middle Country Road, on the right when traveling west. |
| Near Sound Avenue east of Herricks Lane, on the left when traveling east. |
| On Sound Avenue 0.2 miles east of Herricks Lane, on the left when traveling east. |
| Near Sound Ave east of Herricks Lane, on the left when traveling east. |
| On E Main Street at East Avenue, on the right when traveling west on E Main Street. |
| Near Sound Avenue east of Herricks Lane, on the left when traveling east. |
| Near Sound Ave east of Herricks Lane, on the left when traveling east. |
| Near Sound Avenue east of Herricks Lane, on the left when traveling east. |
| Near Sound Avenue east of Herricks Lane, on the left when traveling east. |
| Near Sound Avenue east of Herricks Lane, on the left when traveling east. |
| Near Sound Avenue east of Herricks Lane, on the left when traveling east. |
| Near Sound Ave east of Herricks Lane, on the left when traveling east. |
| On 814 Harrison Avenue, on the right when traveling north. |
Nov. 13, 2026