Menlo Park is a city on the eastern edge of San Mateo County and is well known for being the home of Facebook. It is known to be the most educated city in the United States. Being a very small city, only 17.4 square miles, and 43% water, this place is very special. Most of Menlo Park’s economy is derived from its involvement in technology. Any time residents of Menlo Park have a plumbing issue they call (833) GEN-TEEL.