Seielstad, (December 23, 1886 – July 1, 1960) was an American painter and illustrator.
He claimed his first job was covering the 1906 San Francisco earthquake.
He worked for a variety of newspapers and for Popular Science Monthly in the 1930s before working at Life magazine in the 1940s.
He was accorded a great deal of latitude in illustrating articles for Popular Science Monthly on topics such as an automated freeway, a futuristic city, and "How The World Will End".