| Olybet LBL1 | |
| Extra Information: | 1 Sponsored league name, referring to Olybet. |
| T Bg: |
|
| T Color: | white |
| Season: | 2017–18 |
| Champions: | Ventspils (10th title) |
| Runners Up: | VEF Rīga |
| Semifinalists: | Jūrmala Ogre |
| Teams: | 10 |
| Tv: | LTV7 |
| Prevseason: | 2016–17 |
| Nextseason: | 2018–19 |
The 2017–18 Latvian Basketball League was the 27th and last season of the top basketball league of Latvia. VEF Rīga was the defending champions. Eventually, Rīga lost the final to Ventspils by 2–4.
The same ten teams from the previous season will join the league. The two first qualified teams will join directly the semifinals while teams between third and sixth will qualify to the quarterfinals.
Barons withdrew from the competition.
| Team | width=120 | Home city | Arena |
|---|---|---|---|
| Betsafe/Liepāja | Liepāja | Liepāja Olympic Center | |
| Jēkabpils | Jēkabpils | Jēkabpils Sporta nams | |
| Jūrmala/Fēnikss | Jūrmala | Taurenītis | |
| Latvijas Universitāte | Rīga | OSC | |
| Ogre | Ogre | Ogre's Secondary School No.1 | |
| Valka/Valga | Valga, Estonia | Valga Sports Hall | |
| Valmiera | Valmiera | Vidzeme Olympic Center | |
| VEF Rīga | Rīga | Arena Riga | |
| Ventspils | Ventspils Olympic Center | ||
The playoffs were played with a best-of-five games format, except for the finals, that were played in seven games. Seeded teams played games 1, 3 and 5 at home, except in the finals where the seeded team played at home games 1, 2, 5 and 7.