UP has 75 districts which are part of its 18 divisions. These districts are as follows -

1 Agra

2 Aligarh

3 Allahabad

4 Ambedkar Nagar

5 Auraiya

6 Azamgarh

7 Bagpat

8 Bahraich

9 Ballia

10 Balrampur

11 Banda

12 Barabanki

13 Bareilly

14 Basti

15 Bijnor

16 Budaun

17 Bulandshahr

18 Chandauli

19 Chitrakoot

20 Deoria

21 Etah

22 Etawah

23 Faizabad

24 Farrukhabad

25 Fatehpur

26 Firozabad

27 Gautam Buddha Nagar

28 Ghaziabad

29 Ghazipur

30 Gonda

31 Gorakhpur

32 Hamirpur

33 Hardoi

34 Hathras

35 Jalaun

36 Jaunpur

37 Jhansi

38 Jyotiba Phule Nagar

39 Kannauj

40 Kanpur Dehat

41 Kanpur Nagar

42 Kaushambi

43 Kheri

44 Kushinagar

45 Lalitpur

46 Lucknow

47 Mahoba

48 Maharajganj

49 Mainpuri

50 Mathura

51 Mau

52 Meerut

53 Mirzapur

54 Moradabad

55 Muzaffarnagar

56 Pilibhit

57 Pratapgarh

58 RaeBareli

59 Rampur

60 Saharanpur

61 Sant Kabir Nagar

62 Sant Ravidas Nagar

63 Shahjahanpur

64 Shravasti

65 Siddharthnagar

66 Sitapur

67 Sonbhadra

68 Sultanpur

69 Unnao

70 Varanasi

71 Manyavar Kanshiram Nagar

72 Prabuddha Nagar

73 Panchsheel Nagar

74 Bhim Nagar

75 Chhatrapati Shahuji Maharaj Nagar

Credit: https://www.queryhome.com/gk/11041/how-many-districts-are-there-in-uttar-pradesh-india