| Official Name: | Regdalin |
| Other Name: | Umm Sahaba |
| Native Name: | رقدالين |
| Nickname: | Regdalin |
| Pushpin Map: | Libya |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Libya |
| Subdivision Type: | Country |
| Subdivision Name: |  Libya |
| Subdivision Type1: | Region |
| Subdivision Name1: | Tripolitania |
| Subdivision Type2: | District |
| Subdivision Name2: | Nuqat al Khams |
| Leader Title: | Mayor |
| Leader Name: | Abdullah Almose |
| Population As Of: | 2012 |
| Population Total: | 25.831 |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Islam |
| Timezone: | UCT |
| Utc Offset: | +1 |
| Coordinates: | 32.8833°N 11.9833°W |
| Elevation Footnotes: | [1] |
| Elevation M: | 9 |
| Area Code: | 31 |
Regdalin (Arabic: رقدالين) is a city in Nuqat al Khams district near the Mediterranean coast of Northwestern Libya, 10 km southwest of the district capital Zuwara and 111 km west of Tripoli.
The city is around 11 km (6.2 miles) from Zuwarah, 10 km north of the Mediterranean Sea, and 10 km northwest of Zliten. The town of Al Assad is about 35 km (22 miles) west southwest.
The town is southwest of Zuwarah.
The city's nearest international airport is Zuwarah International Airport.
The name Regdalin derives from the Libyan native Arabic language meaning Sleeping town. Because their elders back then used to sleep under trees
The commercial sector is the cornerstone of economic activity. It has an active industrial zone based on the trade of spare auto parts, mechanical maintenance, building materials trade, and a vegetable and livestock market. The market is held twice a week.[2]
The city's agricultural economy is based on crops such as olives, almonds, grapes, and figs, especially in the Southern and Western regions.
Regdalin offers primary and secondary education via four schools. Education extends to an institute for training in the field of engineering. The faculty of engineering belongs to Al-Zawia University.