The land area of St. Mary's County, MD was 357 in 2018. The land area of Alexandria city, VA was 15 in 2018.

Land Area

Water Area

Land area is a measurement providing the size, in square miles, of the land portions of geographic entities for which the Census Bureau tabulates and disseminates data. Area is calculated from the specific boundary recorded for each entity in the Census Bureau's geographic database. Land area is based on current information in the TIGER® data base, calculated for use with Census 2010.

Water Area figures include inland, coastal, Great Lakes, and territorial sea water. Inland water consists of any lake, reservoir, pond, or similar body of water that is recorded in the Census Bureau's geographic database. It also includes any river, creek, canal, stream, or similar feature that is recorded in that database as a two- dimensional feature (rather than as a single line). The portions of the oceans and related large embayments (such as Chesapeake Bay and Puget Sound), the Gulf of Mexico, and the Caribbean Sea that belong to the United States and its territories are classified as coastal and territorial waters; the Great Lakes are treated as a separate water entity. Rivers and bays that empty into these bodies of water are treated as inland water from the point beyond which they are narrower than 1 nautical mile across. Identification of land and inland, coastal, territorial, and Great Lakes waters is for data presentation purposes only and does not necessarily reflect their legal definitions.

Above charts are based on data from the U.S. Census American Community Survey | ODN Dataset | API - Notes:

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Geographic and Area Datasets Involving St. Mary's County, MD or Alexandria city, VA

  • API

    MDOT/MVA Electric and Plug-in Hybrid Vehicle Registrations by County as of each month end from July 2020 to July 2022

    opendata.maryland.gov | Last Updated 2022-08-03T18:27:22.000Z

    Total number of electric and plug-in hybrid vehicles with active MD registrations by county as of each month end from July 2020 to July 2022

  • API

    MD COVID-19 - Cases by County

    opendata.maryland.gov | Last Updated 2022-09-23T14:59:22.000Z

    <b>Summary</b> The cumulative number of positive COVID-19 cases among Maryland residents within a single Maryland jurisdiction. <b>Description</b> The MD COVID-19 - Cases by County data layer is a collection of positive COVID-19 test results that have been reported each day by the local health department via the ESSENCE system. <b>Terms of Use</b> The Spatial Data, and the information therein, (collectively the "Data") is provided "as is" without warranty of any kind, either expressed, implied, or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct, indirect, incidental, consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data, nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

  • API

    MD COVID-19 - Vaccinations by County

    opendata.maryland.gov | Last Updated 2022-09-23T16:10:47.000Z

    <b>Summary</b> The cumulative number of COVID-19 vaccinations within a single Maryland jurisdiction. <b>Description</b> The MD COVID-19 - Vaccinations by County data layer is a collection of COVID-19 vaccinations that have been reported each day into ImmuNet. <b>Terms of Use</b> The Spatial Data, and the information therein, (collectively the "Data") is provided "as is" without warranty of any kind, either expressed, implied, or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct, indirect, incidental, consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data, nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

  • API

    Maryland Median Household Income By Year With Margin Of Error: 2010-2019

    opendata.maryland.gov | Last Updated 2021-11-01T20:04:52.000Z

    The data consist of the median household income by the year in Maryland and the margin of error of the median income from 2010-2019. MOE= Margin of Error for the 90% confidence interval. Source from the U.S. Census Bureau, Small Area Income and Poverty Estimates, May 2020.

  • API

    MD COVID-19 - Confirmed Deaths by County

    opendata.maryland.gov | Last Updated 2022-09-23T15:01:43.000Z

    <b>Summary</b> The cumulative number of confirmed COVID-19 deaths among Maryland residents within a single Maryland jurisdiction. <b>Description</b> The MD COVID-19 - Confirmed Deaths by County data layer is a collection of the statewide confirmed COVID-19 related deaths that have been reported each day by the Vital Statistics Administration that have occurred in each Maryland jurisdiction. A death is classified as confirmed if the person had a laboratory-confirmed positive COVID-19 test result. Some data on deaths may be unavailable due to the time lag between the death, typically reported by a hospital or other facility, and the submission of the complete death certificate. This data layer does not include probable deaths. Probable deaths are available from the MD COVID-19 - Probable Deaths by County data layer. <b>Terms of Use</b> The Spatial Data, and the information therein, (collectively the "Data") is provided "as is" without warranty of any kind, either expressed, implied, or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct, indirect, incidental, consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data, nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

  • API

    Poverty Rate With Margin Of Error, 2010-2019

    opendata.maryland.gov | Last Updated 2022-04-08T18:22:31.000Z

    The data consist of the poverty rate by year in Maryland and the margin of error of the poverty rate from 2010 to 2019. MOE=Margin of Error for the 90% confidence interval. Sourced from the U.S. Census Bureau, Small Area Income and Poverty Estimates.

  • API

    MD COVID-19 - MASTER Case Tracker

    opendata.maryland.gov | Last Updated 2022-09-23T16:12:18.000Z

    <b>Summary</b> The cases, tests, positivity rates, hospitalizations, and confirmed and probable deaths for COVID-19 in Maryland. <b>Description</b> The MD COVID-19 - MASTER Case Tracker is a collection of Total Cases, Total Tests, Postivity Rates, Persons Tested Negative, Total Daily Hospital Beds, Total Ever Hospitalized, Total Persons Documented to Have Completed Home Isolation, Cases by County, Cases by Age Distribution, Cases by Gender Distribution, Cases by Race and Ethnicity Distribution, Confirmed Deaths Statewide, Confirmed Deaths by Date of Death, Confirmed Deaths by County, Confirmed Deaths by Age Distribution, Confirmed Deaths by Gender Distribution, Confirmed Deaths by Race And Ethnicity Distribution, Probable Deaths Statewide, Probable Deaths by Date of Death, Probable Deaths by County, Probable Deaths by Age Distribution, Probable Deaths by Gender Distribution, and Probable Deaths by Race And Ethnicity Distribution. <b>Terms of Use</b> The Spatial Data, and the information therein, (collectively the "Data") is provided "as is" without warranty of any kind, either expressed, implied, or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct, indirect, incidental, consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data, nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

  • API

    MD COVID-19 - Daily Testing Volume by County

    opendata.maryland.gov | Last Updated 2022-09-23T15:06:17.000Z

    <b>Summary</b> The daily total of COVID-19 tests administered in each Maryland jurisdiction. <b>Description</b> Testing volume data represent the total number of PCR COVID-19 tests electronically reported for residents in each Maryland jurisdiction; this count does not include test results submitted by labs and other clinical facilities through non-electronic means. Electronic lab reports from NEDDSS. <b>Terms of Use</b> The Spatial Data, and the information therein, (collectively the "Data") is provided "as is" without warranty of any kind, either expressed, implied, or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct, indirect, incidental, consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data, nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

  • API

    Maryland Total New Parcels Inside PFA For Residential Development: 2006-2017

    opendata.maryland.gov | Last Updated 2019-09-18T21:45:22.000Z

    Maryland Total New Parcels inside Priority Funding Areas (PFA) for residential development from 2006 through and including 2015 based on the PFA boundaries and MdProperty View Edition year data referenced below. PFAs are existing communities and places where local governments want State investment to support future growth. 2006-2012 Data Sources: -PFA boundaries dated 08/21/2014 -MdProperty View 2012 Edition for all jurisdictions except Allegany and Garrett counties, which are based on MdProperty View 2011 Edition updated with August 2014 parcel data from the State Department of Assessments and Taxation. 2013-2015 Data Sources: -PFA boundaries dated 08/29/2016 -MdProperty View 2013/14 Edition parcel data for all jurisdictions in Maryland except the following: Baltimore, Caroline, Cecil, Dorchester, Harford, Kent, Queen Anne’s, Talbot, and Wicomico counties and Baltimore City, 2013/2014 Edition data updated with June 2016 parcel data from Assessments, and Anne Arundel and Carroll Counties, 2012 Edition data updated with June 2016 parcel data from Assessments. For new parcels included in the June 2016 update, parcel point placement was done via geocoding and not via placement by deed and/or plat.

  • API

    MD COVID-19 - Probable Deaths by County

    opendata.maryland.gov | Last Updated 2022-09-23T15:02:25.000Z

    <b>Summary</b> The cumulative number of probable COVID-19-related deaths among Maryland residents within a single Maryland jurisdiction. <b>Description</b> The MD COVID-19 - Probable Deaths by County data layer is a collection of the statewide probable COVID-19 related deaths that have been reported each day by the Vital Statistics Administration that have occured in each Maryland jurisdiction. A death is classified as probable if the person's death certificate notes COVID-19 to be a probable, suspect or presumed cause or condition. Probable deaths are not yet been confirmed by a laboratory test. Some data on deaths may be unavailable due to the time lag between the death, typically reported by a hospital or other facility, and the submission of the complete death certificate. This data layer does not include confirmed deaths. Confirmed deaths are available from the MD COVID-19 - Confirmed Deaths by County data layer. <b>Terms of Use</b> The Spatial Data, and the information therein, (collectively the "Data") is provided "as is" without warranty of any kind, either expressed, implied, or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct, indirect, incidental, consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data, nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.