| G. K. Thornhill | |
| Order: | 17th |
| Office: | Surveyor General of Ceylon |
| Term Start: | 1932 |
| Term End: | 1937 |
| Predecessor: | A. H. G. Dawson |
| Successor: | L. G. O. Woodhouse |
| Birth Date: | 3 March 1884[1] |
| Death Date: | 29 January 1960 (aged 75) |
| Death Place: | Surrey, England |
| Birthname: | George Kraal Thornhill |
George Kraal Thornhill (3 March 1884 – 29 January 1960) was a British engineer who was the 17th Surveyor General of Ceylon.[2] [3] He was appointed in 1932, succeeding A. H. G. Dawson, and held the office until 1937. He was succeeded by L. G. O. Woodhouse.[4]