Laem Sing is a district (Amphoe) of Chanthaburi Province, eastern Thailand.
Laem Sing district was created in 1898, then named Phlio district. In 1909 the government allocated a budget for the new district office, and changed the district name to Laem Sing. The district office was re-built in 1966 and 1996.
The district is subdivided into 7 subdistricts (tambon), which are further subdivided into 65 villages (muban).
Pak Nam Laem Sing, Ko Proet, Nong Chim, Phlio, Khlong Nam Khem, Bang Sa Kao, Bang Kachai
Ko Perit. Total area is 22.712 square kilometers or approximately 14,080 rai.