Cover Page - shares	9 Months Ended
	Sep. 30, 2022	Oct. 31, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity File Number	1-07183
Entity Registrant Name	TEJON RANCH CO.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0196136
Entity Address, Address Line One	P.O. Box 1000
Entity Address, City or Town	Tejon Ranch
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	93243
City Area Code	661
Local Phone Number	248-3000
Title of 12(b) Security	Common Stock, $0.50 par value
Trading Symbol	TRC
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		26,499,626
Entity Central Index Key	0000096869
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31