Welcome to Devils Lake, North Dakota - Photo Devils Lake Welcome highway sign Western city limits. Access to Lake Region State College. Junction of Highway #19 East and West. Services and fuel at highway. Devils Lake is the county seat for Ramsey County in north central North Dakota. It is the largest city between Grand Forks and Minot and ranks as the 11th largest city in North Dakota. Pick up the trail of America's greatest legends in North Dakota, and you'll find yourself in a legendary adventure of your own. Lewis and Clark, Sakakawea, George Custer, Sitting Bull and Theodore Roosevelt lived out larger-than-life adventures here. Whether you follow in their footsteps and rediscover the past or blaze your own trail and discover what makes North Dakota legendary today, you'll find wide-open spaces and wide-open fun!