The islands of Koh Kong are:

Koh Kong Island
Koh Chas Island
Koh Kapi Island
Koh Moul Island
Koh Sralau Island

As you can see from the map, many smaller islands.
Koh Sdach Island has many bungalows on the island, but is usually accessed from the SihanoukVille Port.

Koh Kong Province is located in the South-West corner of Cambodia, adjoining Thailand at the Hat Lek (Thailand) border crossing. Not much to do in the city of Koh Kong, but outside the city is some of the world’s most beautiful tropical forests, mountains (Cardamom Mountains), jungle, rivers, waterfalls, and several lodges and retreats along the rivers.

Koh Kong is the name of the province, the city of Koh Kong on the coast, and also the largest island off the coast of Koh Kong (City or Province).

Koh Kong Island has no bungalow resorts on the island. It’s the size of Hong Kong, and is very open and wild for the moment. The island is owned by the Cambodian military. They allow day trips to the island. About a 30 minute boat ride from the mainland.

Koh Kong’s smaller islands are located close to the shore of Koh Kong City (and Koh Kong Province), right next to Thailand.

Great island hopping, fishing, and exploring the islands.