Determining the exact word count for Sarah J. Maas's A Court of Thorns and Roses (ACOTAR) is tricky because it varies depending on the edition (hardcover, paperback, ebook) and even the specific formatting used. There isn't a universally agreed-upon number. However, a reasonable estimate, based on several online sources and comparisons to similar-length fantasy novels, places the word count in the range of 70,000 to 80,000 words.
This is just an approximation. The actual number could be slightly higher or lower. To get a precise count, one would need to use word-counting software on a specific edition of the book.