TIOBE October 2026 Rankings: Julia Returns to Top 20 After Three Years

TIOBE released its October 2026 programming language popularity index. The most notable change is Julia returning to the top 20 after a three‑year absence, ranking 18th with a 0.88% share, up 0.42 percentage points year‑over‑year.

Methodology Update

This month TIOBE introduced a significant adjustment: Chinese (Mandarin) search terms are now included in the index with a weight of 44.2% of English search terms. The change aims to more accurately reflect programming activity in the world's second‑largest language community and reduce the long‑standing bias toward English‑centric technical communities.

Top 20 Rankings (October 2026)

Python – 1st, 19.23% (−5.23% YoY)

C – 2nd, 11.33% (+2.04% YoY)

C++ – 3rd, 8.87% (+0.04% YoY)

Java – 4th, 8.41% (+0.06% YoY)

C# – 5th, 3.79% (−3.15% YoY)

JavaScript – 6th, 2.77% (−0.64% YoY)

Visual Basic – 7th, 2.20% (−1.02% YoY)

R – 8th, 2.06% (+0.55% YoY)

SQL – 9th, 1.97% (+0.20% YoY)

Rust – 10th, 1.44% (+0.24% YoY)

Go – 11th, 1.39% (−0.53% YoY)

PHP – 12th, 1.26% (−0.12% YoY)

Fortran – 13th, 1.12% (−0.58% YoY)

Swift – 14th, 1.03% (+0.09% YoY)

Scratch – 15th, 0.97% (−0.18% YoY)

COBOL – 16th, 0.89% (+0.03% YoY)

Perl – 17th, 0.88% (−0.78% YoY)

Julia – 18th, 0.88% (+0.42% YoY)

Delphi/Object Pascal – 19th, 0.83% (−1.03% YoY)

MATLAB – 20th, 0.83% (−0.33% YoY)

Python and C Regain Rating Share

Python's index rose from 17.76% to 19.23%, reversing September's decline, though it remains 5.23 percentage points below its October 2025 level. C's share increased from 10.28% to 11.33%, up 2.04 points year‑over‑year, widening its lead over C++. These shifts reinforce Python's lead, but the methodology change makes it difficult to attribute the growth solely to changing developer interest.

Java Narrows Gap with C++

C++ stands at 8.87% and Java at 8.41%, a gap of 0.46 percentage points. The gap widened to 1.13 points in September before narrowing again. Despite stable rankings for two consecutive months, the third‑place position remains contested. C# fell to 3.79% (5th), trailing Java by 4.62 points and leading JavaScript by only 1.02 points, indicating a larger separation from the top three than its fifth‑place rank suggests. JavaScript holds 2.77% (6th) and Visual Basic 2.20% (7th). R's rise to 2.06% (8th) puts pressure on the lower half of the top 10, with only 0.14 points separating 7th and 8th.

R Reaches Eighth, Rust Under Pressure at Tenth

R surpassed SQL (1.97%) to claim 8th place. Year‑over‑year context: R was 13th in October 2025, now 8th; SQL moved from 10th to 9th. Rust has held 10th for four straight months at 1.44%, with Go close behind at 1.39%. Rust was 16th a year ago, showing a sustained upward trend, though the 0.05‑point gap means a minor shift could swap their positions again. Small differences among the lower top‑10 languages imply rankings may fluctuate in future editions, even if monthly changes do not necessarily reflect broader adoption trends.

Julia Returns After Three Years

TIOBE CEO Paul Jansen notes that Julia has re‑entered the top 20 after roughly three years. Compared with its previous appearance, this return may signal a gradual accumulation of popularity. However, whether Julia can maintain a stable position in the top 20 remains to be confirmed by future rankings.

Julia's growth is driven by demand for modern languages that balance high performance with ease of use. Python offers clean syntax and high abstraction, suitable for rapid development and data processing, but can hit performance limits in compute‑intensive tasks. C++ delivers excellent execution efficiency but has a steeper learning curve and requires handling low‑level details. Julia positions itself between the two, providing relatively high abstraction and a developer‑friendly experience while achieving performance close to traditional high‑performance languages. As scientific computing and data analysis demand both performance and development efficiency, this positioning has become a key reason for Julia's renewed attention.

Conclusion

October's data shows that programming language rankings can shift even when leading technologies remain unchanged. For developers and technical leaders, the TIOBE index offers a useful overview of language visibility, but project requirements, ecosystem support, and developer expertise remain the primary factors when choosing a language.