Hunterdon County vs. Somerset County
Two neighboring New Jersey counties, side by side, from county seats and rail lines to parks and trails.
Side by side
Facts from official county, state and federal sources and other published sources. Each county’s guide has more.
| Fact | Hunterdon County | Somerset County |
|---|---|---|
| County seat | Flemington | Somerville |
| Municipalities | 26 municipalities 14 townships, 10 boroughs, one town (Clinton) and one city (Lambertville) make up Hunterdon County. | 21 municipalities Twelve boroughs and nine townships make up Somerset County. |
| Land area | 427.8 square miles | 301.9 square miles |
| Landscape | Rolling farmland and wooded ridges, crossed by the South Branch of the Raritan and bounded on the west by the Delaware River. | The North and South Branches of the Raritan meet here. The Watchung Mountains, the Somerset Hills and the Sourland Mountain frame river valleys and farmland. |
| Downtowns | Flemington’s Main Street, Clinton’s mill-town center on the South Branch, and the Delaware River towns of Lambertville, Stockton, Frenchtown and Milford. | Somerville’s Main Street and pedestrian Division Street at the county seat, Bound Brook’s Main Street by its station, and Millstone, once the county seat. |
| Rail | Raritan Valley Line, weekdays only, at High Bridge, Annandale, Lebanon and White House. Flemington and the river towns have no NJ Transit rail. | Raritan Valley Line: Bound Brook, Bridgewater, Somerville, Raritan, North Branch. Gladstone Branch: Basking Ridge, Lyons, Bernardsville, Far Hills, Peapack, Gladstone. |
| Highways | I-78 and US 22 at Clinton; US 202 and Routes 31 and 12 at the Flemington Circle; Route 29 along the Delaware. | I-78 and I-287, which meet in Bridgewater and Bedminster, plus US 22, US 202, US 206 and Route 28. |
| Outdoors | Round Valley and Spruce Run reservoirs, the Columbia Trail’s seven Hunterdon miles above the South Branch, and the D&R Canal towpath along the Delaware. | Duke Island Park on the Raritan in Bridgewater, the Sourland Mountain Preserve in Hillsborough, and Duke Farms, with more than 18 miles of trails. |
| Featured towns | Flemington, Raritan Township, Clinton, and LambertvilleMore town guides coming soon | Somerville, Hillsborough, and BridgewaterTown guides coming soon |
| Full guide | Read the Hunterdon County guide | Read the Somerset County guide |
Land area and municipalities: U.S. Census Bureau. The other rows: county, municipal, NJ Transit, NJDOT, other state and federal sources, and local organizations, checked in October 2026.
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Read the full guides
Each guide maps every municipality in the county, with its featured towns and facts at a glance.
More comparisons: Hunterdon vs. Morris, Hunterdon vs. Warren, Morris vs. Somerset, and Somerset vs. Warren
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