I took a bit of time to review the divisions and the gold medals awarded at the 2019 UnitedHealthcare US Open.

Gold Medal Counts by Country or US State from the 2019 UnitedHealthcare US Open

Controversial decision: Players are listed with their state of residence, not with their country of origin/nationality, if/when they differ. i.e. a Canadian citizen that has lived in Texas for 17 years will count for Texas. An Indian citizen that lives in Illinois, will count for Illinois.

2019 US Open Gold Medals Awarded spreadsheet in Open Office format

New tool used this year to help double check the counting:
https://planetcalc.com/3205/

Alphabetically:

1 Argentina
3 Arizona
1 Arkansas
1 Bolivia
16 California
4 Canada
3 Colombia
2 Colorado
6 Costa Rica
2 Ecuador
19 Florida
3 Georgia
2 Guatemala
7 Illinois
4 Indiana
2 Iowa
1 Japan
2 Kansas
1 Maryland
1 Massachusetts
4 Mexico
3 Michigan
17 Minnesota
1 Missouri
1 Nevada
2 New Jersey
2 New York
1 North Carolina
1 North Dakota
3 Ohio
2 Oklahoma
2 Oregon
1 Pennsylvania
1 South Carolina
4 Tennessee
11 Texas
4 Virginia
4 Washington

or again, by most wins:

19 Florida
17 Minnesota
16 California
11 Texas
7 Illinois
6 Costa Rica
4 Canada
4 Indiana
4 Mexico
4 Tennessee
4 Virginia
4 Washington
3 Arizona
3 Colombia
3 Georgia
3 Michigan
3 Ohio
2 Colorado
2 Ecuador
2 Guatemala
2 Iowa
2 Kansas
2 New Jersey
2 New York
2 Oklahoma
2 Oregon
1 Argentina
1 Arkansas
1 Bolivia
1 Japan
1 Maryland
1 Massachusetts
1 Missouri
1 Nevada
1 North Carolina
1 North Dakota
1 Pennsylvania
1 South Carolina