Preah Sihanouk Province (Khmer: ខេត្តព្រះសីហនុ) — often referred to simply as Sihanoukville or Kampong Som — is a dynamic region located on the southwest coast of Cambodia, bordering the Gulf of Thailand. It stands out as Cambodia’s smallest mainland province by land area but remains one of the country’s most economically vital and rapidly developing regions.
Geographical Setting and Natural Assets
Preah Sihanouk covers an area between 1,938 km² and 2,658.9 km², reflecting periodic administrative adjustments. The province features a diverse landscape of tropical rainforests, rolling hills (linked to the Elephant Mountains), 175.81 km of pristine coastline, and a cluster of 32 islands. It borders Koh Kong to the north, Kampong Speu to the west, Kampot to the east, and the open sea to the south. This strategic coastal position has made the region not only a favorite for beachgoers but also vital for national economic activity, notably through maritime trade and logistics.
The province’s islands, like Koh Rong and Koh Rong Samloem, have become internationally recognized for their white-sand beaches and vibrant marine ecosystems, supporting both tourism and traditional fisheries. The Ream National Park, spanning 210 km² and stretching into the sea with islands like Koh Thmei and Koh Seh, offers mangroves, tropical forests, and estuaries, making it a haven for biodiversity and ecotourism.
History and Administrative Evolution
Originally part of Kampot province, the area now known as Preah Sihanouk has a relatively recent urban history. In the 1950s, it was a sparsely populated region of fishing and trading villages. The region’s transformation began with the construction of Cambodia’s only deep-water port — initiated in 1955 and funded with French and American support — which anchored the government’s ambitions for international trade independence.
The city and then the province underwent several name changes. Initially called Kampong Som, it was renamed Preah Sihanouk in honor of King Norodom Sihanouk, a pivotal figure in Cambodia’s modern history. The city was officially designated as a municipality in 1957, later attaining provincial status in 2008 following administrative reforms.
Sihanoukville experienced significant development in the 1960s, becoming a secondary capital, but its fortunes waned during the civil war and Khmer Rouge era, before slowly reviving after Cambodia’s return to peace and stability in the early 1990s.
Demographics and Population Trends
By the 2019 census, Preah Sihanouk province reported a population of 302,887, with a density of around 156 inhabitants per km². Population growth has been rapid due to internal migration, the influx of tourists, and foreign investors — particularly from China, who have played a central role in the region’s construction boom and economic revival. The province’s urban core is Sihanoukville municipality, accompanied by other centers such as Veal Rinh.
Ethnically, the population is predominantly Khmer. However, with the province’s economic globalization, a range of expatriate communities have established themselves, adding to the region’s cultural and linguistic diversity.
Economy: Industry, Trade, and Investment
Preah Sihanouk is a critical engine for national development. Its deep-water seaport — the country’s only such facility — handles most of Cambodia’s international maritime cargo. The city is also a vital node in Cambodia’s international connectivity, with the National Highway No. 4 and the Southern Railway linking it to Phnom Penh and other provinces, and the Preah Sihanouk International Airport facilitating regional and international flights.
The provincial economy features five core pillars:
- Transport and logistics: Anchored by the seaport and infrastructure, supporting Cambodia’s import and export needs.
- Manufacturing: The presence of special economic zones (SEZs) has attracted garment assembly, light industry, and, increasingly, high-value manufacturing.
- Real estate and construction: In the past decade, real estate investments and rapid construction of high-rise buildings, hotels, and casinos — predominantly backed by Chinese capital — have dramatically transformed the Sihanoukville skyline.
- Tourism: The beaches and islands draw both domestic and international tourists, supporting hotels, restaurants, and diverse service industries.
- Fisheries and agriculture: These remain important, especially in rural districts, though their relative economic share has declined with urbanization.
Recent and ongoing investment projects, supported by both government incentives and foreign capital, are expected to generate thousands of new jobs and fortify the province’s role as a manufacturing and service hub.
Tourism: Attractions and Experiences
Preah Sihanouk’s tourism sector is rooted in its beaches and islands, which are considered among Asia’s best. The coastline boasts a variety of popular beaches, including Independence, Sokha, Ochheuteal, Serendipity, Otres, and Ream. These sites support a vibrant hospitality scene, from upscale resorts and nightclubs to backpacker accommodations.
Adventure activities, such as snorkeling, scuba diving, boating, and island-hopping, are highly popular. The islands of Koh Rong and Koh Rong Samloem, in particular, offer world-class coral reefs, jungle trekking, and bioluminescent night swims.
Beyond the coast, inland attractions like the Kbal Chhay waterfall and Ream National Park allow for hiking, wildlife tours, and immersion in Cambodia’s diverse ecosystems — a major draw for ecotourists. The combination of natural and cultural beauty means each year brings a steadily rising number of visitors.
Urban Development and Challenges
The city of Sihanoukville (Preah Sihanouk municipality) is noted for rapid, sometimes chaotic, urbanization. Since 2016, a construction surge — mainly funded by Chinese firms and investors — has fundamentally reshaped the city. Though this development has created jobs and modernized infrastructure, it has also brought significant challenges:
- Pressure on utilities: Water, sewage, roads, and electricity have at times lagged behind demand.
- Environmental concerns: Coastal development, unregulated construction, and waste management are critical issues, potentially jeopardizing the very natural assets drawing visitors and supporting local fisheries.
- Social tensions: The influx of new residents and foreign workers has intensified competition for resources and housing, and, at times, contributed to strains with local communities.
- Governance: The authorities have at times struggled to balance rapid investment with sustainable urban and environmental planning.
Administrative Structure
As of 2024, Preah Sihanouk is divided into three municipalities — Preah Sihanouk, Koh Rong, and Kampong Som — and three districts: Prey Nub, Stueng Hav, and Kampong Seila. Altogether, the province contains 11 sangkats (urban communes), 18 khums (rural communes), and 110 villages.
The provincial symbol incorporates themes of maritime trade, fisheries, and royal heritage — a golden lion, ships, sea fish, and the circle of the ocean, reflecting both its history and aspirations.
Looking Forward
Preah Sihanouk’s future is tied to Cambodia’s broader efforts to modernize its economy and integrate into the global marketplace. Key opportunities include expanding the tourism sector, deepening manufacturing value chains, and ensuring sustainable use of natural resources, particularly as international attention to environmental standards grows. Ensuring a balance between rapid urban growth and ecological preservation will be essential for maintaining the province’s appeal and prosperity.
The province remains a symbol of Cambodia’s ambition to modernize, diversify its economy, and connect internationally — while also serving as an example of the complex challenges and choices facing developing coastal regions in Southeast Asia.
