Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2023	May 04, 2023
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Entity File Number	1-31905
Entity Registrant Name	CKX Lands, Inc.
Entity Incorporation, State or Country Code	LA
Entity Tax Identification Number	72-0144530
Entity Address, Address Line One	2417 Shell Beach Drive
Entity Address, City or Town	Lake Charles
Entity Address, State or Province	LA
Entity Address, Postal Zip Code	70601
City Area Code	337
Local Phone Number	493-2399
Title of 12(b) Security	Common Stock with no par value
Trading Symbol	CKX
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		1,974,427
Entity Central Index Key	0000352955
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Amendment Flag	false