IONIA, city, Michigan, U.S.A., on the Grand river, 34m. E. of Grand Rapids; the county seat of Ionia county. It is served by the Grand Trunk and the Pere Marquette railways. The popula tion was 6,935 in 1920 (89% of native whites) and in 1930 by the Federal census 6,562. Behind the city is an irregular semi circle of hills commanding extensive views of the valley. Ionia is the trade centre of a rich farming district, and the seat of the State reformatory and a State hospital for the insane. The Pere
Marquette maintains repair-shops, and the manufactures include automobiles, reed chairs, florists' pots, porcelain tiles, wire and furniture. Ionia was settled in 1833 by colonists from German Flats, near Herkimer, New York. It was incorporated as a village in 1857, and was chartered as a city in 1873.