There are several people with the surname Deller:
- Alfred Deller (1912–1979), English countertenor.
- Jeremy Deller (born 1966), English artist.
- Keith Deller (born 1959), English professional darts player.
- Mark Deller, English countertenor, son of Alfred Deller.
- Martin Deller, a Canadian musician.
- Reginald Deller (born 1933), English cricketer.
- William "Bill" Deller (born 1943), a leading Australian rules football field umpire.
Dəlilər or Dalliar or Dallyar or Dälilär or Dolyar or Dəllər may also refer to:
- Dəllər Cəyir, Azerbaijan
- Dəllər Cırdaxan, Azerbaijan
- Dəlilər, Agsu, Azerbaijan
- Dəlilər, Saatly, Azerbaijan
- Dəllər, Shamkir, Azerbaijan
- Dalilar, Iran