TRENTON, a city and county-seat of Grundy co., Mo.; on the Crooked Fork of Grand river, and on the Chicago, Rock Island and Pacific railroad; 102 miles N. E. of Leavenworth, Kan. It contains Avalon College (United Brethren), a court house, churches. National and other banks, and several newspapers. It has flour and woolen mills and an assessed property valuation exceeding $1,200,000. Pop. (1910) 5,656; (1920) 6,951.