Honda Announces Historic $3 Billion Investment in New Union County Auto Plant

“I don’t know about you, but I feel like I’m 10 years old and it’s Christmas morning.” That was Union County Commissioner Tom McCarthy’s reaction Monday as Honda announced a historic $3 billion investment to build a new automobile assembly plant in Union County. Monday’s announcement confirms Marysville Matters’ exclusive Oct.

9 reporting that Honda was planning a new assembly plant on company-owned land between its Marysville and East Liberty facilities, a project first revealed through environmental documents filed with Ohio EPA. The project will create more than 2,000 jobs and add capacity to manufacture 240,000 vehicles annually, with production expected to begin in 2029.

The facility will become Honda’s fourth automobile assembly plant in Ohio and its ninth auto-related production facility in the United States. Gov. Mike DeWine said the announcement reflects a relationship between Honda and Ohio that has grown for nearly half a century.

“Honda’s leadership could have chosen to build this plant anywhere in the world, but they chose Ohio because there are so many advantages to being here,” DeWine said. “For almost half a century, Honda and Ohio have grown together, and generations of families have built their careers on Honda’s manufacturing lines.

Today’s announcement isn’t just an investment in a new facility — it’s an investment in Ohio’s people and Ohio’s future.” The new plant will be built on Honda-owned land between its existing Marysville and East Liberty assembly facilities, the same general location Marysville Matters identified in environmental documents last month.

The facility will be designed to manufacture hybrid, gasoline-powered, and electric vehicles, giving Honda flexibility as consumer demand changes. The investment will also increase the company’s hybrid powertrain production capacity in Ohio by 250 percent. For Union County, the announcement represents another major chapter in a relationship that began nearly 50 years ago.

“Today’s investment sends a bold and powerful message,” McCarthy said. “It says that Honda believes in Ohio. It says that Honda believes in Union County and Marysville, and it says that the future of advanced mobility and transportation is going to happen right here.” Honda began manufacturing motorcycles near Marysville in 1979 with just 64 associates.

Its first American-built Accord rolled off the Marysville assembly line three years later. With Monday’s announcement, Honda’s cumulative investment in Ohio will surpass $20 billion, with half of that in Union County.