Dorchester Minerals, L. P. engages in the acquisition, ownership, and administration of producing and nonproducing natural gas and crude oil royalty, net profit, and leasehold interests in the United States. Its royalty properties consist of producing and nonproducing mineral, royalty, and overriding royalty interests located in 582 counties and parishes in 26 states; and net profits interests represent net profits overriding royalty interests in various properties owned by the operating partnership.