Eligibility criteria for championship awards are defined in the Orienteering USA rules for the specific distance or type of event. In general, to be a U.S. champion you need to be a member in good standing of Orienteering USA, and meet one of the citizenship requirement defined in the Rules, section A12.2.
U.S. orienteers compete for championships each calendar year in a number of different disciplines. View the winners of each class under the following disciplines:
There are also champions of U.S. and North American Rogaine events. Compilations of these champions (and *complete lists for Sprint/Middle/Long/Ultralong and Night-O) have not been assembled (any volunteers?).
In even-numbered years, the U.S. and Canada alternately host the North American Orienteering Championships (NAOC), the most recent of which took place in Arnprior and Carp, Ontario, Canada. The 2016 NAOC will be held in the United States.