| Country: | EST |
| Type: | B |
| Route: | 15 |
| Length Km: | 97.2 |
| Terminus A: | Tallinn |
| Terminus B: | Türi |
| Previous Type: | National |
| Previous Route: | 14 |
| Next Type: | National |
| Next Route: | 17 |
Tugimaantee 15 (ofcl. abbr. T15), also called the Tallinn–Rapla–Türi highway (et|Tallinna–Rapla–Türi maantee), is a 97.2-kilometre-long[1] north-south national basic road in northern Estonia. The highway begins at the Tallinn district of Nõmme on national road 4 under the name of Viljandi maantei. It crosses national road 11 in Luige and passes through Kohila, Hagudi, Rapla, Kehtna, Lelle and Käru to national road 5 in Türi.[2]
T15 passes through the following counties and municipalities:[2]