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NACA Regions
NACA is made up of seven regions. Look below to see what region you live in -- and click on your region for more information.

NACA Central
NACA Mid America
NACA Mid Atlantic
NACA Northeast
NACA Northern Plains
NACA South
NACA West

Alaska, Hawaii, Washington, Oregon, California, Nevada, Idaho, Arizona, Utah, Colorado, New Mexico, west of the 107th longitude (which roughly parallels the Rocky Mountains) and the Canadian Province of British Columbia
Montana, Wyoming, Wisconsin, the Upper Peninsula of Michigan, Nebraska, Iowa, Minnesota, North Dakota, South Dakota, and the Canadian Provinces of Alberta, Saskatchewan, Manitoba, and western Ontario 
Michigan, Indiana, Ohio, West Virginia, Kentucky, and Illinois
Virginia (south of metro Washington DC), North Carolina, South Carolina, Georgia, Florida, Alabama, Tennessee, Mississippi, and US & British Virgin Islands
New York, Pennsylvania, New Jersey, Delaware, Maryland, Washington DC (and the surrounding metro area) and the Canadian Province of eastern Ontario
Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, Connecticut, and the Canadian Provinces of New Brunswick and Quebec 
Colorado and New Mexico east of the 107th longitude (which roughly parallels the Rocky Mountains), Kansas, Oklahoma, Missouri, Texas, Arkansas, and Louisiana