| Kommerzijl | |
| Settlement Type: | Village |
| Pushpin Map: | Netherlands Groningen#Netherlands |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in the province of Groningen in the Netherlands |
| Coordinates: | 53.2833°N 25°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Netherlands |
| Subdivision Type1: | Province |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Westerkwartier |
| Unit Pref: | Metric |
| Elevation Footnotes: | [1] |
| Elevation M: | 1.6 |
| Population Footnotes: | [2] |
| Population Total: | 505 |
| Population As Of: | 2021 |
| Population Density Km2: | auto |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postcode |
| Postal Code: | 9880-9882 |
| Area Code Type: | Area code |
| Area Code: | 0594 |
Kommerzijl (in Dutch; Flemish pronounced as /ˈkɔ.mərˌzɛi̯l/; Kommerziel), until the end of the 17th century called Dutch; Flemish: Opslachterzijl, is a linear village in the municipality of Westerkwartier in the province of Groningen in the Netherlands, located on the Kommerzijlsterdiep, which continues after the village as and flows into the . To the west of the village lies the and to the east the . As of 2021, Kommerzijl had a population of 505.[2]
Until the middle of the 17th century, the name Dutch; Flemish: Opslachterzijl was used for zijl and village. The name Kommerzijl appears for the first time in 1602. The suffix -zijl refers to the lock (Dutch; Flemish: zijl) where the village originated. There are two explanations for the stem kommer-: It could refer to the kom ('harbour') behind the dike, where the ships were docked or it could refer to the kommer ('care') associated with the construction and maintenance of the lock. The sconce and the lock can be seen in the coat of arms of Kommerzijl, which was designed for its 400th anniversary.