Loma Mar (Spanish for "Sea Hill") is a census-designated place (CDP) in San Mateo County, California. It is near San Mateo County Memorial Park on Pescadero Creek Road and is in area code 650. Loma Mar is between the towns of Pescadero and La Honda, situated in the Santa Cruz Mountains in the western part of the San Francisco Peninsula. The United States Postal Service has assigned it ZIP Code 94021. As of the census of 2020, there were 134 residents in the CDP. Loma Mar is home to the YMCA's Camp Loma Mar, Redwood Glen Camp and Conference Center as well as a small number of businesses and services including the Loma Mar Store, a post office, and a fire station run by volunteers. Geography The town is located within a redwood forest, and is traversed by the Pescadero Creek. According to the United States Census Bureau, the CDP covers an area of 1.7 square miles (4.5 km), all of it land. Demographics The 2010 United States Census reported that Loma Mar had a population of 113. The population density was . The racial makeup of Loma Mar was 101 (89.4%) White, 2 (1.8%) African American, 0 (0.0%) Native American, 3 (2.7%) Asian, 0 (0.0%) Pacific Islander, 0 (0.0%) from other races, and 7 (6.2%) from two or more races. Hispanic or Latino of any race were 12 persons (10.6%). The Census reported that 113 people (100% of the population) lived in households, 0 (0%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized. There were 54 households, out of which 12 (22.2%) had children under the age of 18 living in them, 24 (44.4%) were opposite-sex married couples living together, 1 (1.9%) had a female householder with no spouse present, 0 (0%) had a male householder with no spouse present. There were 5 (9.3%) unmarried opposite-sex partnerships, and 1 (1.9%) same-sex married couples or partnerships. 21 households (38.9%) were made up of individuals, and 3 (5.6%) had someone living alone who was 65 years of age or older. The average household size was 2.09. There were 25 families (46.3% of all households); the average family size was 2.96. The population was spread out, with 22 people (19.5%) under the age of 18, 2 people (1.8%) aged 18 to 24, 33 people (29.2%) aged 25 to 44, 47 people (41.6%) aged 45 to 64, and 9 people (8.0%)