ولسوالی نجراب یکی از ولسوالی‌های ولایت کاپیسا بوده که تقریبا درشمال شرقی ولایت کابل قرار دارد. مرکز این ولسوالی شیروانی بوده وشامل دره کلان، دره غوث، دره فرخشاه، دره پته، خارج دره و پچغان میباشد. از نظر ساختار قومی اکثریت مردم نجراب تاجیکها هستند و اقوام دیگرهم به تناسب کمتر مانند پشه یی‌ها وپشتونها هم دراین ولسوالی زندگی میکنند. پیداوار مهم این ولسوالی گندم، لوبیا، چهارمغز، توت و جلغوزه سیاه میباشد. نجراب یکی از سرسبزترین ولسوالی‌های شمال کابل بوده ودر این ولسوالی چشمه‌های آب به وفرت پیدا میشود. نفوس این ولسوالی اضافه تر از یکصد وپنجاه هزار نفر بوده ویکی از باسواد ترین مناطق افغانستان به شمار می‌اید. گفته میشود که شمار تحصیلکرده‌ها این ولسوالی به خصوص از نظر تعداد داکتران بسیار زیاداست.

Geography
Nijrab District contains very rugged terrain and many areas are still inaccessible. The mountains that form the boundary with Laghman Province are the highest points in the district and reach a height of around 14,000 feet. Snowfall on the mountains melts slowly and flows into the valleys below. The farmers in Nijrab irrigate the melted snow to water their fields. The total population in Nijrab was a lot more than 100,000 back in 1950-1960s. Nijrab consists of 5 main valleys: Dara-e- Kalan, Dara-e- Ghaows, Daray-e- Pachaghan, Dara-e- Farokh Shah, And Kharij Dara. Sanjan Bolaghaeen, Gyiawa and Durnama belong to Woloswali-e- Kohband but few years back they were all part of Nijrab. the total population is Muslim and follow the Hanafi sect of Islam, 99.8% of the people living in Nijrab speak Persian and they are Persians (or so called Tajik). The Tajik expression according to the history of Afghanistan, has no other meaning but Persian. It is just some political trick avoiding the Islamic republic of Iran, Afghanistan and Tajikistan from becoming one country. Nijrab district contains a number of villages, mostly grouped into seven valleys: Darah Kharj, Darah Ghawes, Darah Pachagan (Afghania, Pachagan, and G'yan), Darah Puta, Darah Farakh Shah, Darah Kalan, and Giawa. Temperatures are relatively warm, leading to a large number of animals such as insects, scorpions, and snakes in the district.
Rivers from the nearby Hindu Kush mountains and springs provide the majority of drinking water for district residents; however, hundreds of hand pump wells have been installed.
Economy
The Nijrab district's economy is primarily agricultural, growing products such as wheat, corn, red beans, walnuts, almonds, and pine nuts.
Education
The district contains a number of primary and high schools. According to Nijrab's Director of Education Ghulam Mayudin, Nijrab has 44 schools. The Nijrab Department of Education is located in a rented office within the bazaar near the District Center. Nijrab suffers from a lack of qualified teachers, especially female teachers. Many schools in Nijrab have received new schools from several US and international organizations. The countries contributing the most to the funding of new schools in Nijrab are the US, Bangladesh (BRAC).
Kapisa and Parwan PRT has recently (late 2008) approved funding for Kohi Girls School (Afghania), Mohammed Ayoob (Pachagan), Engineer Habib Urahman (Kharj), Abdul Manan (Farakh Shah), and Abdul Salam (Pachagan). Qazi Abdul Jamil (Afghania) and Farakh Shah High School (Farakh Shah) were nearing completion as of December 2008.
All areas within Nijrab educate female students to include the Pashtun area of Afghania. There are several girls schools in Afghania. There was an incident in April 2008 in which the Taliban set fire to a girls school in the Afghania area.[ The villagers extinguished the fire and only one classroom was heavily damaged. Aside from that one act of arson, no attacks, threats, or acts of vandalism toward female schools had taken place during 2008. A large majority of villagers in Nijrab support the education of females and request new school buildings (half of the girls schools in Nijrab are without a building at all) with a perimeter wall for protection and privacy.ه گزارش خبرگزاری وحدت (Wahdat News), قراردادی به ارزش مجموعی دو اعشاریه نه میلون دالرمیان وزارت انرژی وآب وشرکت برشنا به منظوردیزاین تولید وتطبیق لین انتقال بیست کیلووات برق ازمحمود راقی به ولسوالی نجراب ولایت کا پیسا امضا گردید.

زندگی نامه ملا محمد عارف نجرابی 

ملا محمد عارف فرزند ملا صالح محمد و نواسۀ صوفی محمد ظریف در یک خانواده متدین و مسلمان در قریۀ ده صوفی دره پته که یکی از دره های مشهور شهرستان نجراب است به دنیا آمده و در همان زادگاهش جهان فانی را وداع گفته است. سال تولد و وفاتش دقیقآ معلوم نبوده اما ازملاحظۀ بعضی از اشعارش میتوان صریحآ گفت که وی تا سال 1316 هجری شمسی حیات داشته است. چنانچه در بیت پاين خودش میگوید:

هست سنه یکهزارو سه صدوده سال وشش 

محمد عارف میرود ازین جهان گویم سخن