The 1934 Detroit Lions season was the fifth season in franchise history. It was the first season the team played in Detroit; the franchise had previously played as the Portsmouth Spartans in Portsmouth, Ohio, a city with a population of approximately 40,000. Under head coach Potsy Clark, the Lions won their first ten games (of which the first seven were shutouts) before losing three straight games to end the season. They finished in second place in the NFL Western Division behind the undefeated Chicago Bears. The lions started 10-0 as did the Bears, but Detroit lost the 3 remaining games whilst Chicago won their 3 remaining fixtures.