Lake Sinoe is alagoon inNorthern Dobruja,Romania, close to theBlack Sea. Its name derives fromSlavic (Blue Lake). The ruins of the ancientGreek colony ofHistria are located on the lake shore.

Sinoe
Sinoe Lake, Constanța County, Romania
Sinoe
Location	Northern Dobruja
Coordinates	44°35′00″N28°50′00″E / 44.58333°N 28.83333°E /44.58333; 28.83333
Type	lagoon, brackish
Basin countries	Romania
Surface area	135.6 km2 (52.4 sq mi)
Max. depth	1.6 m (5 ft 3 in)
Surface elevation	0 m (0 ft)

• Sinoe oil field located on the continental shelf of the Black Sea, discovered in 1991 and developed by Petrom.
• Sinoê an Arcadian nymph associated with theRoman deity Pan

• Map
• Razim-Sinoe^{[permanent dead link‍]} "Biosphere Roadmap" poster from Norwegian Geotechnical Institute (NGI) international centre for geoscience research and consulting
• Razim-Sinoe Case Study^{[permanent dead link‍]} complete 48-page report from Norwegian Geotechnical Institute (NGI) international centre for geoscience research consultants on theDanube Delta Reserve^{[permanent dead link‍]}