| Dera Allah Yar | |
| Settlement Type: | City |
| Official Name: | Dera Allah yar |
| Other Name: | Jhat Pat |
| Pushpin Map: | Balochistan Pakistan#Pakistan |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location within Pakistan |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | Division |
| Subdivision Name2: | Nasirabad |
| Subdivision Type3: | District |
| Subdivision Name3: | Jaffarabad District (1987-present) |
| Established Title: | Established |
| Established Title1: | Preceded |
| Established Date1: | Nasirabad District (1974-1987) |
| Established Title2: | Preceded before Nasirabad District |
| Established Date2: | Kalat District (1954-1974) |
| Population Total: | 98,761 |
| Population Footnotes: | [1] |
| Population As Of: | 2023 |
| Area Total Km2: | 690 |
| Elevation M: | 56 |
| Population Density Km2: | 438.40 |
| Leader Title: | Constituensy |
| Leader Name: | PB-16 Jafarabad NA-255 Sohbat Pur-cum-Jaffarabad-cum-Usta Muhammad-cum-Nasirabad |
| Leader Title1: | Deputy Commissioner Jaffarabad |
| Leader Name1: | Azhar Shahzad |
| Timezone1: | PKT |
| Utc Offset1: | +05:00 |
| Timezone1 Dst: | DST is not observed |
| Postal Code Type: | ZIP Code |
| Postal Code: | 80500 |
| Area Code Type: | NWD (area) code |
| Area Code: | 8289 |
| Iso Code: | PK-BA |
Dera Allah Yar (ur|{{Nastaliq|ڈیرہ اللہ یار) is a city and the headquarters of the Jaffarabad District located in Pakistan's Balochistan province. It lies 300 km from the provincial capital Quetta. According to 2023 Pakistani census population of Jhatpat Subdivision is 302,498.
Dera Allahyar became part of newly created Kalat District in 1954.
Dera Allahyar merged into newly created Nasirabad District in 1984.
Dera Allahyar became headquarter of new created Jafarabad District split from Nasirabad District in 1987.
The city was formerly known as Jhatpat. The city was renamed after the assassination of Mir Allahyar Khan Khosa, a political leader from the area.
According to 2023 Pakistani census Population of Dera Allahyar Subdivision is 302,498 of which 188,011 spoke Balochi, 44,211 Sindhi, 34,493 Saraiki, 31,374 Brahui, 1,273 Pashto, 612 Urdu, 609 Hindko 390 Punjabi & 1,515 others.
The word Dera means abode or settlement in Balochi, Pashto, Urdu, and Punjabi languages. Dera Allah Yar thus means the settlement or city of Allah Yar. Some other cities also have Dera as a pre-fix such as Dera Bugti, Dera Ismail Khan, and Dera Ghazi Khan.
On 27 August 2008 at least 25 people belonging to the Jamhoori Wattan Party (JWP-Aali) suffered injuries when a bomb exploded in a public meeting. The bomb had been placed on a motorcycle, the activists had gathered for a meeting on the second anniversary of the death of Akbar Bugti.[2]