West Menlo Park is a census-designated place and an Unincorporated community in San Mateo County, California, located between the majority of City of Menlo Park, the Town of Atherton, the Sharon Heights neighborhood of Menlo Park and Stanford University (in Santa Clara County).

The area consists of suburban housing and a small business district along Alameda de las Pulgas (literally, "Avenue of the Fleas"), often just referred to as "the Alameda", which extends the length of the Rancho de las Pulgas land granted to the Argüello family.

According to the United States Census Bureau, the CDP has a total area of 0.5 square miles (1.3 km2), all of it land.

The 2010 United States Census[2] reported that West Menlo Park had a population of 3,659.

292 households (21.5%) were made up of individuals, and 122 (9.0%) had someone living alone who was 65 years of age or older.

There were 1,422 housing units at an average density of 2,925.2 per square mile (1,129.4/km2), of which 1,091 (80.5%) were owner-occupied, and 265 (19.5%) were occupied by renters.

25.0% of all households were made up of individuals, and 8.7% had someone living alone who was 65 years of age or older.

In the California State Legislature, West Menlo Park is in the 13th Senate District, represented by Democrat Josh Becker, and in the 24th Assembly District, represented by Democrat Alex Lee.