| 2018–19 Premier League Tournament Tier B | |
| Fromdate: | 31 January 2019 |
| Todate: | 23 May 2019 |
| Administrator: | Sri Lanka Cricket |
| Cricket Format: | First-class cricket |
| Tournament Format: | Round-robin |
| Host: |  Sri Lanka |
| Champions: | Lankan Cricket Club |
| Participants: | 9 |
| Matches: | 36 |
| Most Runs: | Damith Perera (792) |
| Most Wickets: | Dinuka Hettiarachchi (54) |
| Previous Year: | 2017–18 |
| Previous Tournament: | 2017–18 Premier League Tournament Tier B |
| Next Year: | 2019–20 |
| Next Tournament: | 2019–20 Premier League Tournament Tier B |
The 2018–19 Premier League Tournament Tier B was the second division of the 31st season of first-class cricket in Sri Lanka's Premier Trophy. The tournament was contested by nine teams, starting on 31 January 2019 and concluding on 23 May 2019.[1] Negombo Cricket Club won the tournament in the previous season and were promoted to Tier A.[2] They were replaced in Tier B by Bloomfield Cricket and Athletic Club after their relegation from Tier A.[3]
Lankan Cricket Club won the tournament and secured promotion to Tier A, after finishing top of the points table ahead of Sri Lanka Navy Sports Club.[4]
| Team[5] | |||||||
|---|---|---|---|---|---|---|---|
| Lankan Cricket Club | 8 | 1 | 0 | 7 | 0 | 87.78 | |
| Sri Lanka Navy Sports Club | 8 | 3 | 0 | 5 | 0 | 82.26 | |
| Bloomfield Cricket and Athletic Club | 8 | 2 | 0 | 6 | 0 | 76.07 | |
| Galle Cricket Club | 8 | 2 | 1 | 5 | 0 | 70.20 | |
| Panadura Sports Club | 8 | 1 | 3 | 4 | 0 | 69.50 | |
| Police Sports Club | 8 | 0 | 1 | 7 | 0 | 67.32 | |
| Sri Lanka Air Force Sports Club | 8 | 0 | 0 | 8 | 0 | 66.65 | |
| Kurunegala Youth Cricket Club | 8 | 0 | 3 | 5 | 0 | 60.65 | |
| Kalutara Town Club | 8 | 1 | 2 | 5 | 0 | 50.68 |
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