San Mar, MD Profile: Facts, Map & Data


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San Mar, Maryland - Basic Facts

The San Mar Census Designated Place had a population of 385 as of July 1, 2017.

The primary coordinate point for San Mar is located at latitude 39.5524 and longitude -77.6407 in Washington County. The formal boundaries for the San Mar Census Designated Place (see map below) encompass a land area of 0.45 sq. miles and a water area of 0 sq. miles. Washington County is in the Eastern time zone (GMT -5). The elevation is 554 feet.

The San Mar Census Designated Place (GNIS ID: 2389798) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The San Mar Census Designated Place is located within District 16, Beaver Creek, a minor civil division (MCD) of Washington County.

Beneath the boundary map are tables with San Mar population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Alternate Unofficial Names for San Mar: Sanmar.

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San Mar Census Designated Place, MD Boundary Map

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Boundary Maps: District 16, Beaver Creek | Washington County | Maryland Counties / Independent Cities

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San Mar, MD Data & Demographics (As of July 1, 2017)


Total Population 385
Daytime Population: Workers 502
Daytime Population: Residents 215
Total Daytime Population (TDP) 717
Ratio TDP/Total Population1 1.86
Population in Households 368
Population in Familes 318
Population in Group Qrtrs 17
Population Density2 852
Diversity Index3 25


Median Household Income $71,631
Average Household Income $102,929
Per Capita Income $39,225


Total Housing Units 146 (100%)
Owner Occupied HU 110 (75.3%)
Renter Occupied HU 21 (14.4%)
Vacant Housing Units 16 (11.0%)
Median Home Value $242,045
Average Home Value $291,667


Total Households 130
Average Household Size 2.83
Family Households 100
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.04% 0.31%
Households 0.11% 0.31%
Families 5.9% 0.2%
Median Household Income   2.54%
Per Capita Income   3.13%

San Mar, MD - Peer Comparisons by Rank and Percentile

The table below compares San Mar to the other 518 incorporated cities, towns and CDPs in Maryland by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 389 25th
Population Density # 320 38th
Diversity Index # 356 31st
Median Household Income # 234 55th
Per Capita Income # 167 68th

Additional comparisons and rankings can be made with a VERY EASY TO USE Maryland Census Data Comparison Tool.

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