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Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2020
Feb. 16, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Document Transition Report false    
Entity File Number 1-12928    
Entity Registrant Name AGREE REALTY CORPORATION    
Entity Incorporation, State or Country Code MD    
Entity Tax Identification Number 38-3148187    
Entity Address, Address Line One 70 E. Long Lake Road    
Entity Address, City or Town Bloomfield Hills    
Entity Address, State or Province MI    
Entity Address, Postal Zip Code 48304    
City Area Code 248    
Local Phone Number 737-4190    
Title of 12(b) Security Common Stock    
Trading Symbol ADC    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Entity Shell Company false    
Entity Public Float     $ 3,538,555,255
Entity Common Stock, Shares Outstanding   63,471,483  
Entity Central Index Key 0000917251    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Amendment Flag false