WASHINGTON—Orders for long-lasting factory goods rose in November, the latest sign of improving demand this year for U.S. manufactured products.

Orders for durable goods—products designed to last at least three years, such as computers and trucks—increased 1.3% from the prior month to a seasonally adjusted $241.36 billion in November, the Commerce Department said Friday. The overall increase was led by orders for airplanes, motor vehicles and military equipment.

Economists...