At which university in Pakistan can I study interior design?

For Interior Design, one can try studying in either the United Kingdom, China, Malaysia or Pakistan. The two universities in Pakistan that are known for excellence in the field of Interior Design are National College of Arts and National Textile University in Lahore.
National College of Arts offers both a Bachelors program as well as Masters degree courses; whereas NBU only provides postgraduate programs with their Bachelor program being separately provided by Punjab Institute of Fashion and Design. Programs related to Interior for any other field such as Architecture or Landscape Architecture is only offered at NCA and not at NTU.
The applied sciences under which such coursework falls are architecture, geography, economic design engineering (interior vs structural), drafting & design.

Namal College of Interior Design - Karachi, Pakistan
- The program is spread over three semesters and is designed to be completed within a year. This intensive course prepares students for working in interior design offices and briefing clients on the existing requirements of their living spaces for incorporation into plans. The curriculum includes subjects such as Drawing, Vector Illustration, Web Designing, Product Development & Packaging, Color Combination Theory, Soft Furnishing Techniques and more.
- As an industry recognized institution with an impressive clientele list; Namal provides the necessary tools to equip the graduate with all essential skills to suitably cut out a niche market without looking back. A major prerequisite for this course is a passion towards creativity and innovation.

There are numerous interior design schools in Pakistan, but a popular one is Indus Valley School of Arts and Architecture.

They offer undergraduate degree courses ranging from level 1 to 4 at associate, bachelor’s and graduate levels. Full-time students can study for 2 years at the junior college level to acquire the necessary 60 credits required for admission into any course or eight semesters (1.0x9) at other levels including diploma courses plus 2 x 6 month nursing assistant courses totaling 120 credits and then proceed onto higher classes by securing 60 additional credits from elsewhere/training institutions (dual credit) or by sitting an entrance exam that matches their qualifications with seats available on campus (competitive admissions).

You have many options for interior design universities in Pakistan including the University of Punjab, National College of Arts, or Lahore School of Fashion Design. The admissions process is fairly straightforward, as you only need to sit your NTS test scores and submit an application all through the PIEAS website.
You can also run a search on any Pakistani university website and see what Interior Design course information they offer.

The status of design education in Pakistan has not been studied much, but the most well known schools for design are Iqra University Karachi and Quaid-e-Azam University Islamabad.
There is no mention specifically about Interior Design at either one, but there's a remarkable variety of programs to choose from if you're looking for something else. The best place to start would be the university's website.
A Western equivalent degree might be a Bachelor Degree in Interior Architecture or Residential Interior Design, which may last four years Masters Degrees could include Interaction Design or Wearables (with focus on clothing). These degrees typically have less to do with designing interiors than with interactive surface design and wearable computing.

The Architecture site will provide a list of universities who offer the course.
In Pakistan, it is worth mentioning that Pakistan National College of Arts (PNCA) offers an Interior Design diploma which is intensive and heavily theory based with some practical space allocation. There are a number of graduates in eastern universities known for their expertise in interior design such as Shahrah-e-Quaid-e-Azam College Karachi, one from Government Science College Islamabad and others from NBP Tahir Girls Degree College Lahore. The Interior Designers Association also provides information to its members to take care when appointing any designing professional under different authorities framing legislation on hiring arrangements nationwide .