Seaside Park is a small oceanfront borough in Ocean County, New Jersey, occupying the southern portion of the Barnegat Peninsula, a narrow barrier island between the Atlantic Ocean and Barnegat Bay. With roughly 1,400 year-round residents, it is one of the quieter municipalities on the northern Jersey Shore, sitting immediately south of the livelier Seaside Heights and across Barnegat Bay from the mainland communities of Ocean County. The borough traces its origins to 1874, when settlers established a community they initially called Park City with the goal of creating a seaside park on the barrier beach. A branch of the Pennsylvania Railroad soon carried summer visitors to a string of grand late-gilded-age hotels, establishing an enduring identity as a seasonal resort. Long before European settlement, the Lenape people summered on the island, which they called Seheyichbi, meaning land bordering the ocean. Today Seaside Park remains overwhelmingly residential, with a nearly two-mile oceanfront beach running along its eastern edge behind a continuous line of dunes. Development is oriented toward the beach: a compact boardwalk and amusement pier occupy the northern end near the Seaside Heights line, while quieter residential blocks extend south toward Island Beach State Park. Barnegat Bay forms the western boundary and offers docks, marinas, and calm-water access for boaters and anglers. The borough's economy and daily life revolve around the summer season, when the population swells with seasonal residents and day visitors. Route 35, the island's main north-south corridor, and NJ Transit bus service connect Seaside Park to the mainland and to employment centers elsewhere in Ocean County and the broader New York metropolitan area, of which the borough is formally a part. That combination of a walkable beach community and a manageable mainland commute makes Seaside Park a distinct choice for buyers seeking a year-round or seasonal home on the Jersey Shore.