Öland: The Baltic Island Where Windmills Outnumbered Churches
Drive across the Öland Bridge from Kalmar on a blustery afternoon and the mills begin almost immediately: small, weather-greyed wooden towers standing alone in pastures, lined up along village lanes, perched on limestone ridges with their sails locked against the sky. Öland, Sweden's second-largest island, is a long, narrow strip of land in the Baltic Sea, yet it preserves roughly 350 historic windmills, one of the densest collections found anywhere in the world. In the mid-nineteenth century the number was closer to 2,000. This is the story of how a slender Baltic island became Sweden's windmill landscape above all others.
An island made for wind
Öland stretches for well over a hundred kilometres along Sweden's southeast coast, yet it is only a handful of kilometres wide for much of its length. Its backbone is a limestone plateau, and in the south this bedrock breaks the surface as the Stora Alvaret, a vast, nearly treeless heath of thin soils, junipers and rare wildflowers. There are no rivers of any consequence on the island, which meant that the waterwheels powering mills across much of mainland Sweden were never a realistic option here. What Öland had instead, in almost embarrassing abundance, was wind. With open sea on both sides and little forest to slow the airflow, a steady breeze sweeps the ridges for a large share of the year. Grain grew well on the cultivated coastal strips flanking the alvar, and grain must be milled. The combination was decisive: on Öland, if you wanted flour, you looked upward, not to running water. The island's farmers drew the obvious conclusion, and they drew it thousands of times over.
One farm, one mill
What makes Öland's mill landscape unusual is not just the number of mills but the logic behind them. In many parts of Europe, milling was a privileged trade: a licensed miller ground the grain of an entire district, often in a single large mill owned by a landlord or the crown. On Öland the pattern was different. Here the windmill became, in effect, a piece of ordinary farm equipment. During the eighteenth and nineteenth centuries, as land reforms reshaped Swedish agriculture and the grain economy strengthened, it became customary for each farm to raise its own small mill. A farmstead without one was seen as incomplete, and the mill grew into a marker of standing: a well-kept mill on a visible rise told neighbours and travellers that the household was solvent and serious. Because the typical Öland mill was small and comparatively cheap to build, this ideal was within reach of ordinary farmers rather than only the wealthy. Villages ended up with mills by the dozen, and at the height of the custom, around the middle of the nineteenth century, the island as a whole is reckoned to have carried close to 2,000 of them.
The post mill, Öland style
The overwhelming majority of Öland's surviving mills are post mills, known in Swedish as stubbkvarnar. The principle is elegant: the entire wooden body of the mill, machinery and all, balances on a single massive vertical post, traditionally of oak, braced by cross-timbers at its foot and often resting on a low footing of local limestone. When the wind shifts, the miller does not turn a cap or a fantail; he turns the whole building, levering it around with a long tail pole until the sails face squarely into the wind. Inside, the mechanism is modest, usually driving one pair of millstones, enough to grind for a household and its animals rather than for a market town. The bodies are clad in pine boarding, sometimes tarred dark, sometimes left to weather into the silvery grey that now defines the island's palette. The design had a further advantage suited to Öland's farm-by-farm mill culture: a post mill is small enough to be moved. Mills were bought, sold, inherited and hauled between farms and villages, and many of the mills standing today are known to have spent their working lives in more than one location.
Mill rows: Lerkaka and Störlinge
Although each mill typically belonged to a single farm, the mills themselves often stood together. Villages placed them on shared windy ground, on ridges and roadside banks where the breeze ran clean, and the result was the kvarnrad, the mill row, which remains the island's most striking signature. The best known is at Lerkaka on eastern Öland, where five post mills stand in a neat line beside the road, one of the most photographed scenes in the province. Further north along the same coast, Störlinge boasts a row of seven mills, often described as the longest surviving mill row on the island. Standing before them, it is easy to picture what the landscape looked like when rows like these were the rule rather than the exception, and when a traveller along the coast road would rarely have been out of sight of turning sails. The rows also reveal something about village society: milling was private, but the wind was common property, and the best of it was shared.
Sandvik and the great Dutch mills
Not every mill on Öland was a farmer's post mill. A small number of Dutch mills, the type where only the cap rotates while a tall tower stands fixed, were built for milling on a commercial scale. The most famous stands at Sandvik on the island's northwest coast: an eight-storey giant that ranks among the largest windmills in northern Europe. Raised in the mid-nineteenth century and, according to local history, first erected on the Swedish mainland before being dismantled and rebuilt at Sandvik, it worked as an industrial flour mill in a way no stubbkvarn ever could, serving customers far beyond a single village. Its later life has been gentler: the great tower has long housed a restaurant, and it remains one of northern Öland's landmarks, visible far out over the Kalmar Strait. The contrast between Sandvik's bulk and the hip-height doorways of the post mills tells the whole economic story of wind power on the island in a single glance.
Decline, rescue and the tar brush
The mills' working era ended the way it did almost everywhere: steam power, then electricity, and industrial roller mills that ground finer flour faster and cheaper than any pair of wind-driven stones. Öland was hit doubly hard, because the same decades brought severe hardship and mass emigration, with a large share of the island's population leaving for America in the late nineteenth and early twentieth centuries. Farms were abandoned, and mills that no longer earned their keep were demolished, sold for timber or simply left to collapse. That around 350 survived is no accident. From early in the twentieth century, local heritage societies, the hembygdsföreningar, together with individual owners, began repairing, tarring and re-boarding the mills, treating them as monuments rather than machinery. That work never ends: wooden mills in a maritime climate demand constant care, new sail stocks, fresh tar, sound shingles. The mills also belong to a wider protected landscape, for the agricultural landscape of southern Öland, farmed continuously since prehistory, was inscribed on the UNESCO World Heritage list in the year 2000, and the mills are part of the same long story of people working this stubborn, generous island.
Seeing the mills today
The finest way to meet Öland's mills is slowly, by bicycle or on foot along the smaller roads that shadow the coasts, where mills appear every few kilometres like punctuation marks. Most stand on private or village land and are viewed from outside, though some are opened in summer by local societies, and the rows at Lerkaka and Störlinge have become natural stopping points with the mills right beside the road. Pair the mills with the island's other faces: the bird-rich shores, the alvar in orchid season, the ruined castle above Borgholm. Everywhere, the mills reward attention to detail, from the worn oak posts to the initials and dates that owners cut into beams and door frames.
Explore on the map
Öland's mills are best understood as a constellation rather than as single monuments, and a map makes that instantly clear. We have gathered documented windmills on Öland and far beyond on our interactive map, where you can trace the mill rows along the east coast, find Sandvik's giant on the northwest shore, and plan a route of your own. Zoom in on the island and watch the dots cluster, then compare it with any other region in Europe, and you will see at once why this small Baltic island earned its reputation.