...Ohio. Lebanon, Ohio.
WFDF and Ultiworld are reporting the tournament will be held in Cincinnati, Ohio, though the geographical truth is the international ultimate tourney will be played ~30 miles north of Cincinnati. Specifically, the tournament - Men's Mixed and Women's (no Masters) - will be held at the Lebanon Sports Complex. The finals may be scheduled elsewhere; perhaps in Cincinnati.
The WUCC have been played in the United States twice before; in Honolulu, Hawaii (2002) and Madison, Wisconsin (1993).