Dennis Gruending (born May 18, 1948 in St. Benedict, Saskatchewan ) is a Canadian journalist and politician. He is primarily a writer of non-fiction, but has published a book of poetry and various pieces of short fiction. He is a journalist who has worked for three newspapers and for the Canadian Broadcasting Corporation as a radio host, radio producer, and television reporter.

He was elected to Parliament in a 1999 byelection in Saskatoon—Rosetown—Biggar, as a New Democratic Party candidate. However, he lost to Carol Skelton of the Canadian Alliance in the 2000 election

In the 2004 election, Gruending ran again in Saskatoon—Rosetown—Biggar, but lost again.