# Commensal Fermentation — Portland, Oregon

> Commensal Fermentation in Portland, Oregon, United States scores 4.22 out of 5 — Great, #29 in Oregon. 50 beers tracked, mostly IPA.

*Canonical page: <https://finding.beer/brewery/commensal-fermentation-30991/> · data updated 2026-09-10*

Breadcrumb: Breweries → United States → Oregon → Commensal Fermentation

Commensal Fermentation is a brewery in Portland, Oregon, United States. We grade it Great, with a score of 4.22 out of 5 on the beer it brews — #29 in Oregon. Of the 50 beers we track, 45% are IPA and 25% Pale Ale.

## Rating

- Score: 4.22 out of 5
- Grade: Great 😀 — Consistently produce world-class beer.
- Ranked: #29 in Oregon · #849 in United States · #1,153 worldwide
- Popularity: Barely rated
- Beers tracked: 50

## About

Commensal Fermentation produce's high quality beer and is ranked #40 in Oregon. They are most well known for "Single Cell Shark", which is a New England Pale Ale and "Bags Out of the Cat", which is a Session IPA. Their primary focus is brewing IPAs and Pale Ales.

## What they brew

- IPA — 45% of the beers we track
- Pale Ale — 25% of the beers we track
- Pale Lager — 17% of the beers we track
- Stout / Porter — 4% of the beers we track
- Other — 4% of the beers we track
- Amber Ale — 3% of the beers we track
- Specialty Beer — 2% of the beers we track

## Find them

- Address: 3901 North Williams Avenue, Portland, Oregon, United States
- Coordinates: 45.551018, -122.6669547
- Website: https://cmnsl.co/

## Breweries nearby

- [StormBreaker Brewing](https://finding.beer/brewery/stormbreaker-brewing-1708.md) — 3.88, Fine — Portland, Oregon — 0.4 mi away
- [Ecliptic Brewing](https://finding.beer/brewery/ecliptic-brewing-5219.md) — 3.86, Fine — Portland, Oregon — 0.5 mi away
- [Old Town Brewing](https://finding.beer/brewery/old-town-brewing-5152.md) — 3.76, Fine — Portland, Oregon — 0.7 mi away
- [Ex Novo Brewing](https://finding.beer/brewery/ex-novo-brewing-2943.md) — 4.23, Great — Portland, Oregon — 0.8 mi away
- [Lazy Days Brewing](https://finding.beer/brewery/lazy-days-brewing-31947.md) — 3.90, Fine — Portland, Oregon — 0.8 mi away
- [LABrewatory](https://finding.beer/brewery/labrewatory-5166.md) — 3.56, Poor — Portland, Oregon — 0.8 mi away
- [McMenamins](https://finding.beer/brewery/mcmenamins-2838.md) — 3.76, Fine — Portland, Oregon — 0.8 mi away
- [Widmer Brothers Brewing](https://finding.beer/brewery/widmer-brothers-brewing-1138.md) — 3.10, Limited — Portland, Oregon — 0.8 mi away

## Rankings this brewery appears in

- [Best breweries in Portland, Oregon](https://finding.beer/breweries/united-states/oregon/portland.md)
- [Best breweries in Oregon](https://finding.beer/breweries/united-states/oregon.md)
- [Best breweries in United States](https://finding.beer/breweries/united-states.md)

---

Finding Beer scores breweries on the beer they brew rather than on the venue. Method: <https://finding.beer/how-we-rank.md>. Rankings by place: <https://finding.beer/breweries.md>. The iPhone app adds a live map of what is around you: https://apps.apple.com/us/app/finding-beer/id1082135126