Si-O Subdistrict is an official administrative tambon of Kumphawapi District in Udon Thani, Thailand. Its official Thai name is สีออ and its six-digit administrative code is 410410.

Sources: OCHA COD-AB Thailand (Royal Thai Survey Department source), reconciled to current DOPA codes
Last reviewed: 15 September 2026
Content owner: Thailand Navigator Editorial Lead
Page type: Subdistrict guide

Explore Thailand

Explore Places

Explore Directory

Explore Living

Explore Business

Explore Guides

Si-O Subdistrict

Understand the areas

Explore Si-O Subdistrict

Things to do

Find a business or service in Si-O Subdistrict

Living in Si-O Subdistrict

Plan the practical details

Weather in Si-O Subdistrict

Nearby destinations

About Si-O Subdistrict

Suggest content

Correct this page

Suggestion submitted

Choose language