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Cover - shares
 6 Months Ended
Jun. 30, 2021
Aug. 13, 2021
Cover [Abstract]    
Entity Registrant Name KINGSTONE COMPANIES, INC.  
Entity Central Index Key 0000033992  
Document Type 10-Q  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Small Business true  
Entity Shell Company false  
Entity Emerging Growth Company false  
Entity Current Reporting Status Yes  
Document Period End Date Jun. 30, 2021  
Entity Filer Category Non-accelerated Filer  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2021  
Entity Common Stock Shares Outstanding   10,564,299
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current Yes  
Entity File Number 0-1665  
Entity Incorporation State Country Code DE  
Entity Tax Identification Number 36-2476480  
Entity Address Address Line 1 15 Joys Lane  
Entity Address City Or Town Kingston,  
Entity Address State Or Province NY  
Entity Address Postal Zip Code 12401  
City Area Code 845  
Local Phone Number 802-7900  
Security 12b Title Common Stock, $0.01 par value per share  
Trading Symbol KINS  
Security Exchange Name NASDAQ