Here are the top 10 YouTubers by subscriber count in several different countries:
United States:
- PewDiePie - 110 million subscribers
- Cocomelon - Nursery Rhymes - 123 million subscribers
- Dude Perfect - 61.5 million subscribers
- Shane Dawson TV - 23.4 million subscribers
- Jenna Marbles - 20.4 million subscribers
- MrBeast - 62.8 million subscribers
- VanossGaming - 25.8 million subscribers
- Zoella - 4.85 million subscribers
- Rooster Teeth - 9.52 million subscribers
- Casey Neistat - 12.8 million subscribers
United Kingdom:
- KSI - 24.5 million subscribers
- T-Series - 176 million subscribers
- Dude Perfect - 61.5 million subscribers
- The Slow Mo Guys - 13.5 million subscribers
- Zoella - 4.85 million subscribers
- Dan and Phil - 6.12 million subscribers
- Colin Furze - 10.2 million subscribers
- TheDiamondMinecart - 10.1 million subscribers
- Miranda Sings - 10.8 million subscribers
- Tanya Burr - 3.49 million subscribers
India:
- T-Series - 176 million subscribers
- PewDiePie - 110 million subscribers
- CarryMinati - 33.9 million subscribers
- Amit Bhadana - 24.5 million subscribers
- Technical Guruji - 20.8 million subscribers
- Ashish Chanchlani Vines - 22.6 million subscribers
- BB Ki Vines - 20.2 million subscribers
- Sandeep Maheshwari - 19.5 million subscribers
- Zakir Khan - 9.9 million subscribers
- FactTechz - 14.5 million subscribers
China:
- Tencent Video - 114 million subscribers
- CCTV - 114 million subscribers
- Bilibili - 38.9 million subscribers
- iQiyi - 101 million subscribers
- Mango TV - 54.5 million subscribers
- Zhejiang TV - 16.5 million subscribers
- Xigua Video - 13.2 million subscribers
- Kuaishou - 30.9 million subscribers
- Youku - 17.4 million subscribers
- Douyin - 10.7 million subscribers
These rankings are accurate as of my knowledge cutoff of September 2021 and are subject to change over time.