Lake Burullus (Arabic: بحيرة البرلس, romanized: Buḥayrat al-Burullus; Ancient Greek: λίμνη Σεβεννυτική, romanized: limnē Sebennytikē)[3] is a brackish water lake in the Nile Delta in Egypt, the name coming from Burullus town (Coptic: Ϯⲡⲁⲣⲁⲗⲓⲁ,[4] from Ancient Greek παράλιος, "coast, seaside" or ⲛⲓⲕⲉϫⲱⲟⲩ Nikejow).

It is located in Kafr el-Sheikh Governorate east of Rosetta, bordered by the Mediterranean Sea in the north and agricultural land to the south.

In the early Islamic period, the port of Burullus was situated near the mouth of the lake (the place where it was connected to the sea through a small opening).

At this time the lake was growing and expanding southwards as a result of changes in fluvial deposition and generalized substrate subsidence.

Fish species declined from 52 recorded at the beginning of the 20th century, mostly due to the inflow of agricultural drainage into the lake resulting in lower salinity.