Document and Entity Information - USD ($)	12 Months Ended
	Aug. 31, 2021	Oct. 31, 2021	Feb. 28, 2021
Document and Entity Information
Document Type	10-K
Document Period End Date	Aug. 31, 2021
Entity File Number	1-9852
Entity Registrant Name	CHASE CORPORATION
Entity Incorporation, State or Country Code	MA
Entity Tax Identification Number	11-1797126
Entity Address, Address Line One	295 University Avenue
Entity Address, City or Town	Westwood
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02090
City Area Code	781
Local Phone Number	332-0700
Title of 12(b) Security	Common stock, $.10 par value
Trading Symbol	CCF
Security Exchange Name	NYSEAMER
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		9,457,489
Document Annual Report	true
Document Transition Report	false
Entity Central Index Key	0000830524
Current Fiscal Year End Date	--08-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
ICFR Auditor Attestation Flag	true
Amendment Flag	false
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Public Float			$ 573,033,000