Happily, today is a "ferial" day, which means the priest can pick any Mass (in the ordinary form); so I used the Mass for Saint Rose-Philippine.
After Mass, I was talking with one of the parishioners about how many American saints there are; and I wasn't sure. So, when I got back, I did some research:
Feast Saint Burial/shrine
January 4 Saint Elizabeth Ann Seton Emmitsburg, MD
January 5 Saint John Neumann Philadelphia, PA
January 23 Saint Marianne Cope Syracuse, NY
March 3 Saint Katherine Drexel Bensalem Twp, PA
April 2 Saint Pedro Calungsod, martyr Martyred in Guam;
Shrine: Cebu City, Philippines
May 8 Blessed Teresa Demjanovich Convent Station, NJ
May 10 Saint Damion de Veuster Leuven, Belgium
July 1 Blessed Junípero Serra Carmel, CA
July 13 Blessed Carlos Manuel Rodriguez Santiago Caguas, Puerto Rico
July 14 Saint Kateri Tekakwitha Kahnawake, Quebec
October 3 Saint (Mother) Theodore Guerin St. Mary of the Woods, IN
October 5 Blessed Francis Xavier Seelos New Orleans, LA
October 6 Blessed Diego Luis de San Vitores, Martyr Guam
October 19 Saints Isaac Jogues, Midland, Ontario;
John Brebouf and Companions, martyrs Auriesville, NY
November 6 Blessed Eduardo Farre, Martyr;
Blessed Lucas Tristany, Martyr
(Priests of Tucson, AZ who died in Spanish Civil War)
November 13 Saint Francis Cabrini Manhattan, NY;
November 18 Saint Rose Philippine Duschesne Saint Charles, MO.
I bet that's more than you thought!
A couple of notes. Not all these are on the general calendar; the blesseds, in particular. As a result, I'm not 100% certain of the date they are observed; the two martyrs from Tucson, Arizona, in particular, were hard to track down. Also, I don't know of a shrine for either of them. Readers?