1920 Electricity comes to Penobscot. The last of Penobscot's brickyards closes. The last schooner to be launched from Penobscot leaves Winslow Cove. Penobscot Elementary School is built. 1954 Clark High School closes.
Students leave town to go to high school.
The Penobscot Nursing Home is founded by the Berzinis family. Penobscot celebrates its bicentennial.