This study reports zirconium-in-rutile thermometry data from the Himalayan ultrahigh-pressure eclogites and their retrogressed counterparts. The Zr contents of three textural varieties of rutile i.e. matrix rutile, inclusion phase, and overgrown by ilmenite/titanite from coesite-bearing eclogites, slightly retrogressed eclogites, highly retrogressed eclogites, and amphibolites were analyzed for Zr contents using the electron probe microanalyser. Majority of the rutile grains exhibited homogeneous chemical compositions in all the aforementioned textural varieties; however, some of grains were relatively heterogeneous. Average temperature values of 729 degrees C, 727 degrees C, and 706 degrees C were obtained for the matrix, inclusion, and overgrown rutiles from UHP eclogites and of 705 degrees C, 699 degrees C, and 707 degrees C for those from HP eclogites, respectively. Slightly retrogressed eclogites yielded similar average T values of 703 degrees C, 706 degrees C, and 706 degrees C, respectively, whereas highly retrogressed eclogites resulted in relatively low average temperatures, ca. 690 degrees C, 691 degrees C, and 679 degrees C, respectively. When compared with these eclogites, lower average T values of 672 degrees C, 630 degrees C, and 656 degrees C were obtained from garnetites, and of 665 degrees C, 658 degrees C, and 640 degrees C from garnet amphibolites, respectively. The relatively homogeneous Zr contents and higher temperature values from the matrix rutile in HP and UHP eclogites suggest peak or near-peak metamorphic crystallization, whereas grains with low Zr contents, yielding low temperature values, were likely to be affected by the late-stage retrogression. (C) 2019 Elsevier B.V. All rights reserved.