Spouse: 
                                    Clara Hesperia Bannister (married around 1881)
                                    Children: 
                                    Seven children, One adopted child:  Walter Bannister, Edward Chester, Marjorie, Helen Clara, John (he died in infancy, 1893), Elisabeth Mannering, and Robert; Alfred Edward Bannister (Clara's nephew, adopted in 1898)
                                    
                                    
                                    Family Members Who Have Served in the Minnesota Legislature: 
                                    
                                    
                                
                             
                            
                                
                                    He came to Minnesota in 1879.  He moved to Duluth, Minnesota in 1892.
Congdon served as the Minnesota representative to the Republican National Convention in 1916 (MNopedia).
Congdon built Duluth's Glensheen.