The potential site list includes eight in St. Charles County, including one proposed by St. Charles along the Missouri River near the Bangert Island recreation area.

Another in Ehlmann’s county is across Highway 40 (Interstate 64) from the WingHaven development in O’Fallon, Mo.

The list also includes, among others, the North Park-Express Scripts area and Plumbers and Pipefitters Union complex in north St. Louis County, midtown St. Louis near St. Louis University, the old MetLife campus in south St. Louis County, the former Chrysler plant site in Fenton and the old Monsanto plant and Pruitt-Igoe sites in St. Louis.

Metro East locations include sites in Edwardsville, Collinsville, O’Fallon and Pontoon Beach.

Seeking an endorsement from East-West Gateway’s 24-person board, which includes the heads of the region’s main Missouri and Illinois counties and other members, could be a way of getting buy-in from more than just St. Louis and St. Louis County.

“We’re working in that direction,” Wild said. “That’s what we want it to be.”

One official from another part of the area — St. Clair County Board Chairman Mark Kern — earlier this month had said his county was planning to make its own pitch to Amazon.