Before the storm, before the hotels and cottages, the peninsula belonged to the Ojibwa - now the Mississaugas of the Credit First Nation. D.W. Smith's Gazetteer recorded in 1813 that the peninsula was 'considered so healthy by the Mississaugas that they resort to it whenever indisposed.' British Crown records show Treaty 13, the Toronto Purchase of 1787 and 1805, compensated the Mississaugas with goods including rifle flints, 24 brass kettles, 120 mirrors, 24 laced hats, and 96 gallons of rum. The Mississaugas maintained the islands were never properly included in the agreement and the compensation was inadequate. They started a land claim process in 1986 that finally reached settlement in 2010. Today the City of Toronto's master plan for the islands includes improved education and commemoration of Indigenous history - an acknowledgment, more than two centuries late, of whose sacred ground this was.

After the 1858 storm created the islands, the Hanlan family became among the first year-round settlers, arriving at Gibraltar Point in 1862. John Hanlan built a hotel at the northwest tip in 1878, and the area became known as Hanlan's Point. His son Edward 'Ned' Hanlan earned international recognition as a champion rower before taking over the family's island businesses. The family built an amusement park in the 1880s, and in 1897, Hanlan's Point Stadium rose alongside it for the Toronto Maple Leaf baseball team. On that field in 1914, Babe Ruth hit his first professional home run, sending the ball into the waters of Lake Ontario. Meanwhile, Ward's Island developed differently - starting as eight summer tenants paying $10 for the season in 1899, growing into a tent community so populous that by 1913 the city organized its canvas streets into a permanent layout. Centre Island drew Toronto's wealthiest families, who built large Victorian summer homes drawn by the Royal Canadian Yacht Club, which had established itself on the harbour side of RCYC Island in 1881.

At the islands' residential peak in the 1950s, some 630 cottages and homes stretched from Ward's Island to Hanlan's Point, with a movie theatre, bowling alley, stores, and dance halls. Then Metropolitan Toronto Council decided to replace the community with public parkland. Starting in 1955, the Metro Parks Department demolished homes whose leases had expired. By 1963, everyone willing to leave had departed. The remaining residents dug in. The Toronto Islands Residents Association formed in 1969. By 1970, 250 homes on Ward's and Algonquin Islands had survived the bulldozer. The standoff escalated until July 28, 1980, when a sheriff arrived at the Algonquin Island Bridge to serve eviction notices and was met by a crowd of community members who persuaded him to withdraw. After the Supreme Court ruled the city could evict them, the province intervened. In 1993, Premier Bob Rae helped pass the Toronto Islands Residential Community Stewardship Act, granting 99-year leases and establishing a land trust. Today, would-be buyers join a 500-person waiting list through lottery - no bids, no negotiation, no open market.

The 15 islands are an exercise in coexisting opposites. Billy Bishop Toronto City Airport occupies the northwestern tip, handling regional airlines, medevac flights, and private aviation through a pedestrian tunnel opened in 2015 - but the tunnel connects only to the airport, not to the rest of the island park. Hanlan's Point Beach is an officially recognized clothing-optional beach and was acknowledged by City Council in 2023 as Canada's oldest extant queer space and the site of the country's first Gay Pride gathering in 1971. Centreville Amusement Park, opened in 1967, sits on Middle Island but is commonly mistaken for Centre Island. The islands' school has operated since 1888, when a one-room building stood near the Gibraltar Point Lighthouse; today the Island Public/Natural Science School serves kindergarten through grade six, with 85 percent of its students commuting by ferry from the mainland. Cars are banned entirely - only City of Toronto service vehicles are permitted - making these 15 islands the largest urban car-free community on the continent.

The islands exist because of geology and persist despite it. They are composed of alluvial deposits from the erosion of the Scarborough Bluffs, carried westward by a counter-clockwise current generated by the Niagara River's flow across Lake Ontario. In the 1960s, the extension of the Leslie Street Spit halted natural sediment deposition, meaning the islands would slowly diminish without the hard shorelines built to limit erosion. The lake itself shapes daily life: cooler waters drop summer temperatures two to three degrees below the mainland, fog forms more frequently, and the harbour freezes only after sustained cold. Record flooding in 2017 and 2019 brought sandbags and industrial pumps. These islands were not built to last forever - they are sand, pushed into place by water, held together by human stubbornness and engineering. The same storm that created them could, given enough force, reshape them again. For now, they sit ten minutes from downtown Toronto by ferry, a car-free world where the only sounds are bicycle bells, ferry horns, and the steady lap of Lake Ontario against shores that were once a single, unbroken curve of sand.