This sector comprises establishments primarily engaged in extracting naturally occurring minerals. These can be solids, such as coal and ores; liquids, such as crude petroleum; and gases, such as natural gas. The term mining is used in the broad sense to include quarrying, well operations, milling (for example, crushing, screening, washing, or flotation) and other preparation customarily done at the mine site, or as a part of mining activity. Establishments engaged in exploration for minerals, development of mineral properties and mining operations are included in this sector. Establishments performing similar activities, on a contract or fee basis, are also included.

Classification Reference

Official classification fields for this page

Official classification fields taken from the current StatCan source bundle.

Characteristic	Description
Official title	Mining, quarrying, and oil and gas extraction
Classification	NAICS Canada 2022 Version 1.0
Publishing authority	Statistics Canada
Hierarchical level	Sector
Parent code	Top-level sector
International correspondence	ISIC Rev. 4; harmonized with US and Mexico NAICS at higher levels.
Source	https://www.statcan.gc.ca/en/subjects/standard/naics/2022/v1/index
Source verification	2026-05-05

Canada Business Context

Canada-wide tax and filing context

Canada-wide business, tax, and filing context from the local country pack and tax pack.

Characteristic	Description
Tax authority	Canada Revenue Agency (CRA)
Business identifier	Business Number (BN): 9-digit identifier with program account suffixes such as RT0001 for GST/HST, RP0001 for payroll, and RC0001 for corporate income tax.
Filing requirements	Business Number registration; Form T2125 (Statement of Business or Professional Activities) attached to T1; Form T2 (Corporation Income Tax Return); Form T5013; Form GST34
Sector authority	No cluster authority recorded in the local country pack.

Classification Confidence Score

3 of 5 factors passing

6/ 10

Verified official source — naics-scian-2022-structure-v1-eng.csv (2026-05-05)

International crosswalk — No international correspondence found

Previous edition migration — NAICS 2017 to 2022 continuity confirmed

Complete hierarchy — 1 levels confirmed in hierarchy

Size or threshold documented — Not applicable for hub levels

Trade or export match — No direct HS code correspondence in current bundle

Legacy crosswalk — Legacy system (SIC 1980) retired in this region

Business Profiles

When you might need code 21

Professions specific to this sector are linked to this part of the Canadian classifier so the page speaks to real work teams.

01 21

Drilling rig coordinator

Use this page when the file covers drilling programs, rig moves, contractor rosters, and site readiness. It helps confirm whether 21 Mining, quarrying, and oil and gas extraction is the closest NAICS Canada branch before BN registration, GST/HST review, banking onboarding, procurement notes, or internal classification work.

02 21

Oilfield service dispatcher

Use this page when the file covers rig support crews, field maintenance calls, service trucks, and wellsite logistics. It helps confirm whether 21 Mining, quarrying, and oil and gas extraction is the closest NAICS Canada branch before BN registration, GST/HST review, banking onboarding, procurement notes, or internal classification work.

03 21

Mineral exploration geologist

Use this page when the file covers mineral surveys, sample programs, drill targets, and exploration camps. It helps confirm whether 21 Mining, quarrying, and oil and gas extraction is the closest NAICS Canada branch before BN registration, GST/HST review, banking onboarding, procurement notes, or internal classification work.

04 21

Mine ventilation technologist

Use this page when the file covers underground airflow planning, safety monitoring, fan systems, and shaft support. It helps confirm whether 21 Mining, quarrying, and oil and gas extraction is the closest NAICS Canada branch before BN registration, GST/HST review, banking onboarding, procurement notes, or internal classification work.

Business Map

Business categories in this branch

A rotating set of business activity examples linked to this part of the Canadian hierarchy.

Source row

21Mining, quarrying, and oil and gas extraction

This page mirrors the source row from the structure CSV and the matching rows from the elements and crosswalk files.

Frequently asked questions

What does code 21 cover?

Mining, quarrying, and oil and gas extraction: This sector comprises establishments primarily engaged in extracting naturally occurring minerals. These can be solids, such as coal and ores; liquids, such as crude petroleum; and gases, such as natural gas. The term mining is used in the broad sense to incl...

Which level of the hierarchy is 21?

It is a sector page in the NAICS Canada 2026 hierarchy.

What is the parent of 21?

This page sits at the top sector level and has no parent page above it.

Should I stop at 21 or go lower?

3 lower-level item(s) sit under this branch: Oil and gas extraction, Mining and quarrying (except oil and gas), Support activities for mining, and oil and gas extraction.

Are official inclusion notes attached to 21?

No inclusion rows are attached to this page in the local elements file.

Are there exclusion notes for 21?

No exclusion rows are attached to this page in the local elements file.

Does 21 include illustrative examples?

No example rows are attached on this page in the local elements file.

What kinds of businesses often start from this page?

Examples in this branch include Field drilling, Quarry operations, Oil and gas support, Industrial minerals, Resource extraction.

Is there an ISIC mapping for 21?

No ISIC correspondence row is attached to this page.

Does this page show a US NAICS reference?

No same-code US NAICS reference row is attached on this page.

Why are both English and French titles shown?

NAICS Canada is bilingual, so the page keeps both language titles visible for comparison and lookup.

Where does the page text come from?

From the local StatCan structure file, elements file, ISIC crosswalk, and the bundled US 6-digit reference workbook.