Dénes Gireczki, also known as Dionisius Gireczky in other sources (Kuró, Sáros County, June 10, 1891 – United States, after 1937), was a Greek Catholic priest. The beginning of his ecclesiastical career is not entirely clear: according to some sources, he was ordained as an Orthodox priest, while other sources indicate that he was originally Greek Catholic and then temporarily joined the Orthodox Church. In 1921, he joined or returned to the Greek Catholic Church. That same year, he served as an assistant pastor in Ungtölgyes, and then left for the United States.

He began his ministry in the United States in 1921 in Baden, Pennsylvania. Between 1923 and 1925, he served in St. Joseph, Michigan; in 1925, in Barton, Ohio; and between 1926 and 1933, in Barnesboro, Pennsylvania—now Northern Cambria. Around 1937, he was the Greek Catholic pastor in Tallmadge, Ohio. He was a married priest, but his wife’s name is unknown. The exact place and date of his death, as well as his burial site, cannot be determined at this time.