Neighbourhoods renters often start with
Phnom Penh
Neighbourhoods renters often start with
Phnom Penh is divided into khan (districts) and sangkat (quarters). Expatriate housing conversations often start in a small set of those districts. That is a starting map, not a ranking.

Boeung Keng Kang (often shortened to BKK) and Chamkar Mon sit close to many offices, embassies, and international clinics. They are frequently the first names in a rental shortlist. They are also among the more crowded and more expensive parts of the city, and traffic on the main boulevards is heavy at peak hours.
Toul Kork, north of the central grid, is often discussed for slightly larger apartments and for access to the Russian Boulevard corridor. Daun Penh includes the riverside, Wat Phnom, and the Central Market (Phsar Thmei). It is practical if you want to be near those landmarks and the older grid of streets. It is less practical if you need a short daily trip to a school or an office on the far side of the city.
Sen Sok, Chroy Changvar (across the Japanese Friendship Bridge), and Mean Chey are used by households who want more space or a newer building and who can accept a longer commute. The right choice depends on the school run, the workplace, and whether you will rely on a car, a driver, or a motorcycle. A neighbourhood that works for one household can be a poor fit for another. Walk the route to school or work at the hour you will actually travel before you sign a lease.