- Obeyesekera v. Banda – NLR – 447 of 20 [1918] LKHC 16; [1918] 3; (1918) 20 NLR 447 (19 November 1918)
- Obiyas Appuhamy v. The Queen – NLR – 32 of 54 [1952] LKHC 4; [1952] 28; (1952) 54 NLR 32 (17 March 1952)
- Ogilvy v. Caruppen – NLR – 300 of 11 [1907] LKHC 6; [1907] 4; (1907) 11 NLR 300 (10 September 1907)
- Oliver v. Borella Police – NLR – 68 of 49 [1947] LKHC 59; [1947] 39; (1947) 49 NLR 68 (2 December 1947)
- Omar Katha v. Sedera – NLR – 375 of 77 [1974] LKHC 7; [1974] 6; (1974) 77 NLR 375 (28 March 1974)
- Ossen v. Excise Inspector Ponniah – NLR – 50 of 34 [1932] LKHC 7; [1932] 24; (1932) 34 NLR 50 (4 May 1932)
- Ossen v. Siadoris – NLR – 223 of 1 [1895] LKHC 33; [1895] 19; (1895) 1 NLR 223 (8 November 1895)