Udhailiyah (Arabic: العضيلية ʿuḍayliyyah) is a small oil company compound in the interior of the Eastern Province of Saudi Arabia in the desert southwest of the Dhahran-Dammam-Khobar metropolitan area.

The community today is a multi-ethnic mosaic of Saudis, Americans, South Africans, other Arab nationalities (e.g. Egyptian and Jordanian), Indians, Pakistanis, etc.

Udhailiyah camp has amenities including swimming pools, weight rooms (separate for males and females), dining halls, golf course (oil-sand greens), tennis facilities, squash and racquetball courts, library and a commissary (small grocery store).

Lummus, and others, a camp expansion that included green belts, adobe style town houses, and a new Kindergarten-through-ninth-grade school was designed by a California architecture firm.

The camp was "mothballed" in the late 1980s following the completion of Phase IIA of the Gas Program, and reopened in the early 1990s near the end of Operation Desert Storm.