| Olai Petersen Wiig | |
| Office1: | Member of the Storting from Østfold |
| Term Start1: | 1845 |
| Term End1: | 1847 |
| Term Start2: | 1851 |
| Term End2: | 1870 |
| Term Start3: | 1874 |
| Term End3: | 1879 |
| Office4: | Deputy Member of the Storting from Østfold |
| Term Start4: | 1848 |
| Term End4: | 1850 |
| Term Start5: | 1871 |
| Term End5: | 1873 |
| Office6: | Mayor of Trøgstad, Norway |
| Term Start6: | 1844 |
| Term End6: | 1847 |
| Successor6: | Zyprian Svendsen Sødtland |
| Birth Date: | 10 October 1802 |
| Birth Place: | Trøgstad, Norway |
| Death Place: | Trøgstad, Norway |
Olai Pedersen Wiig (10 October 1802 – 29 September 1887) was a Norwegian politician who served as the mayor of Trøgstad between 1844 and 1847. Wiig served in the Storting between 1845 and 1847, before serving as a deputy member of the Storting between 1848 and 1850, after which he returned to a full member between 1851 and 1870. Wiig served as a deputy member between 1871 and 1873 before finishing off his career as full member between 1874 and 1879.
Wiig was born on October 10, 1802, in Trøgstad, Norway.[1] He spent most of his early life as a farmer.[1]
Wiig was mayor of Trøgstad briefly between 1844 and 1847.[2] When his term ended, he was succeeded by Zyprian Svendsen Sødtland.[2]
Wiig was elected to the Storting in 1845 as a member from Smaalenenes Amt (Østfold).[1] [2] His first term ended in 1847. In 1848 he was elected as a deputy member, which he served as until 1850.[1] [2] In 1851 he was again elected as a full member, serving 7 terms consecutive.[1] [2] In 1871 he began a term as a deputy member.[1] [2] In 1873 his deputy member term ended.[1] [2] In 1874 he was yet again elected as a full member of the Storting, serving two more terms before retiring to his mill in 1879.[1] [2]
Wiig retired to the Lier, Norway region, where he founded a cardboard and paper factory, Stiklen cardboard and paper factory, which had around 25 employees .[3] Wiig died on 29 September 1887 in Trøgstad.[1] [2]