US Nationals

Eastern Section

New England Region:
Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont

North Atlantic Region:  
New York,  
New Jersey (except some cities)  
Pennsylvania (Erie only)

South Atlantic Region:  
Delaware, District of Columbia, Florida, Georgia, Maryland, North Carolina, South Carolina, Virginia, West Virginia,  
New Jersey (only Atlantic City, Brick Town, Cherry Hill, Princeton)  
Pennsylvania (except Erie)  
Tennessee (only Chattanooga)

Midwestern Section

Eastern Great Lakes Region:  
Alabama, Indiana, Kentucky, Mississippi, Ohio  
Michigan (Lower Peninsula)  
Tennessee (except Chattanooga)

Southwestern Region:  
Arkansas, Colorado, Louisiana, Nebraska, New Mexico, Oklahoma, Texas  
Kansas (including Kansas suburbs in Missouri)  
[Note: for Precision, Colorado teams are excluded from this region]

Upper Great Lakes Region:  
Illinois, Iowa, Minnesota, North Dakota, South Dakota, Wisconsin  
Michigan (Upper Peninsula)  
Missouri (except for Kansas City area and St Joseph)

Pacific Coast Section

Central Pacific Region:  
Hawaii, Utah  
California (Visalia and all cities North)  
Nevada (except Las Vegas)  
[Note: for Precision, Colorado is included in this Region]

Northwest Pacific Region:  
Alaska, Idaho, Montana, Oregon, Washington, Wyoming

Southwest Pacific Region:  
Arizona  
California (all cities south of Visalia)  
Nevada (Las Vegas only)