 He also served on the Stamford board of selectmen (1746–1777) for 31 years, and in the Connecticut State Militia as a colonel.Davenport was a member of the Connecticut House of Representatives from 1759–1766, and the Connecticut Council from 1766–1784.On New England's Dark Day (19 May 1780), that body was deliberating on an amendment regulating fisheries of Alosinae and alewife when the House adjourned due to darkness.