Helmsdale began as a busy herring port, with its small harbour set on the Moray Firth at the mouth of the river. Archaeological evidence shows extensive prehistoric settlement in the area. Later, Norse settlers gave the village its name, Hjalmundsair—meaning “the valley of Hjalmund”—which appears in the Icelandic Sagas.

During the early medieval period, people built a refuge here for pilgrims travelling north to St Magnus Cathedral in Orkney. In 1488, the Earls of Sutherland constructed a hunting lodge at West Helmsdale, and in 1615 they rebuilt it as a castle. However, over time, these early structures disappeared, as developers either demolished them or buried them beneath the modern village layout.

In the early 1800s, planners redesigned Helmsdale as a structured settlement with a regular street pattern. They built it specifically for crofters who had been cleared from inland straths during the Highland Clearances. Around the same time, Thomas Telford oversaw the first bridge across the river in 1811. Although the modern A9 now bypasses it, the Old Bridge still stands today.

As the 19th century progressed, Helmsdale grew into an important staging post for travellers, so inns and hotels quickly appeared. At the same time, the village strengthened its role as a centre for herring fishing. Notably, builders constructed the village’s surviving ice-house in 1824, and it remains a key reminder of that industry.