Musaid or Imsaad (Arabic: امساعد) is a town in Butnan District in eastern Libya.

Alternates names include: Oistant, Msa'ed, Imsa'ed, and Musa'ed.

Musaid lies approximately 150 kilometres (93 miles) east of Tobruk and is the major border crossing between Libya and Egypt.

This war, the break-off of Libyan-Egyptian diplomatic relations, and the resultant trade embargo with Egypt, had a very negative impact on Musaid.

After the 1977 war and the follow-on trade embargo with Egypt, this was replaced in part by smuggling, aided by the close tribal ties across the border.