Auto Premiums Lower in Iowa, N.D. and S.D.

Iowa, North Dakota and South Dakota have the least expensive auto insurance premiums in the United States. Iowa has the lowest average rate — $631 — and North Dakota comes in second at $650, according to data from the “Auto Insurance Database Report 2008/2009,” released by the National Association of Insurance Commissioners.

South Dakota is the third least expensive state ($651). Louisiana ($1,270), the District of Columbia ($1,265) and New Jersey ($1,218) have the most expensive auto insurance.