More than on most islands, where you stay on Koh Samui decides what kind of trip you have. The beaches are spread around a 50 km ring road, taxis are not cheap and there is no real public transport after dark — so most people end up spending their evenings wherever their hotel is.
Broadly: the east coast (Chaweng and Lamai) has the best sand, the most hotels and nearly all the nightlife. The north coast (Bophut, Maenam, Bang Rak) is calmer, with coarser sand, views of Koh Phangan and the best restaurants. The north-east corner (Choeng Mon) has small sheltered bays ideal for families. The west and south are for sunsets, seclusion and resort-based stays.
Below, each area comes with a short, honest summary and a few hotels we would consider ourselves, across budgets. Hotel links go to Trip.com for live rates and availability; we do not print prices because Samui rates can double between low and peak season.

