How Many Volumes of Naruto Are There?
Shueisha collected Naruto into 72 tankobon under the Jump Comics line. The first volume appeared on March 3, 2000, roughly six months after the manga began in Weekly Shonen Jump, and the final volume, volume 72, closed the set on February 4, 2015, about three months after the last chapter ran in the magazine.
The split between the two halves of the story falls at volume 27. Volumes 1 to 27 reprint chapters 1 to 238, the whole of Part I, and volume 27 also carries the Kakashi Gaiden interlude, chapters 239 to 244, which tells Kakashi's wartime backstory. Volume 28 reopens the story after the two and a half year time skip, and Part II runs from there to volume 72.
Viz Media published the same 72 volumes in English. The first English volume came out on August 6, 2003, early enough that the English line was still years behind Japan, and the final English volume arrived on October 6, 2015. The volume count is identical in both languages, which makes cross-referencing a Japanese and an English shelf unusually simple for a series this size.
What else sits beside the 72
The 72 volumes are the main series only. Around them stand the ten-chapter sequel miniseries Naruto Gaiden (one volume), four official databooks, two official fanbooks, three Kishimoto art books, the Hiden and Shinden light novel lines, and the Boruto sequel manga, which is a separate series with its own numbering. A complete Naruto bookcase is the 72 plus whichever of those companion shelves a collector chooses to count.
Reading the spines
Japanese Jump Comics volumes carry a consistent spine design across all 72, so a full run lines up as one unbroken block of Kishimoto cover art, each cover a group portrait or a single character study from that volume's chapters. The English Viz run changed its spine and logo treatment over its twelve years, so an English set visibly shows the eras of its own publication. Neither is wrong; they are two different records of the same 72 books.