The land area of Montgomery County, MD was 491 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:

1. ODN datasets and APIs are subject to change and may differ in format from the original source data in order to provide a user-friendly experience on this site.

2. To build your own apps using this data, see the ODN Dataset and API links.

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Geographic and Area Datasets Involving Montgomery County, MD

  • API

    Howard County Police Department Call For Service - 2014-2018

    opendata.howardcountymd.gov | Last Updated 2019-12-04T14:05:48.000Z

    Calls for Service by computer aided dispatch (CAD) event type, date, time, location, statistical reporting area (SRA), and beat.

  • API

    Crash Reporting - Incidents Data

    data.montgomerycountymd.gov | Last Updated 2020-01-17T06:41:11.000Z

    This dataset provides general information about each collision and details of all traffic collisions occurring on county and local roadways within Montgomery County, as collected via the Automated Crash Reporting System (ACRS) of the Maryland State Police, and reported by the Montgomery County Police, Gaithersburg Police, Rockville Police, or the Maryland-National Capital Park Police. Please note that these collision reports are based on preliminary information supplied to the Police Department by the reporting parties. Therefore, the collision data available on this web page may reflect: -Information not yet verified by further investigation -Information that may include verified and unverified collision data -Preliminary collision classifications may be changed at a later date based upon further investigation -Information may include mechanical or human error This dataset can be joined with the other 2 Crash Reporting datasets (see URLs below) by the State Report Number. * Crash Reporting - Drivers Data at https://data.montgomerycountymd.gov/Public-Safety/Crash-Reporting-Drivers-Data/mmzv-x632 * Crash Reporting - Non-Motorists Data at https://data.montgomerycountymd.gov/Public-Safety/Crash-Reporting-Non-Motorists-Data/n7fk-dce5 Update Frequency : Weekly

  • API

    Crime

    data.montgomerycountymd.gov | Last Updated 2020-01-23T08:30:40.000Z

    Updated daily postings on Montgomery County’s open data website, dataMontgomery, provide the public with direct access to crime statistic databases - including raw data and search functions – of reported County crime. The data presented is derived from reported crimes classified according to the National Incident-Based Reporting System (NIBRS) of the Criminal Justice Information Services (CJIS) Division Uniform Crime Reporting (UCR) Program and documented by approved police incident reports. The data is compiled by “EJustice”, a respected law enforcement records-management system used by the Montgomery County Police Department and many other law enforcement agencies. To protect victims’ privacy, no names or other personal information are released. All data is refreshed on a quarterly basis to reflect any changes in status due to on-going police investigation. dataMontgomery allows the public to query the Montgomery County Police Department's database of founded crime. The information contained herein includes all founded crimes reported after July 1st 2016 and entered to-date utilizing Uniform Crime Reporting (UCR) rules. Please note that under UCR rules multiple offenses may appear as part of a single founded reported incident, and each offense may have multiple victims. Please note that these crime reports are based on preliminary information supplied to the Police Department by the reporting parties. Therefore, the crime data available on this web page may reflect: -Information not yet verified by further investigation -Information that may include attempted and reported crime -Preliminary crime classifications that may be changed at a later date based upon further investigation -Information that may include mechanical or human error -Arrest information [Note: all arrested persons are presumed innocent until proven guilty in a court of law.] Update Frequency: Daily

  • API

    Building, Electrical, Fire, Grading, Mechanical, Plumbing & Sign Permits: 2010 - Present

    opendata.howardcountymd.gov | Last Updated 2019-12-12T16:57:41.000Z

    Issued Permits: 01/01/2010 - Present

  • API

    MC311 Service Requests

    data.montgomerycountymd.gov | Last Updated 2020-01-23T06:17:20.000Z

    Information on all MC311 Service Requests received (via email or phone) since July 1, 2012. This data is updated daily. The PIO’s business requirement includes adding the following data elements to the new and enhanced open data site being proposed by DTS. This data is derived from requests for service which originate in the CSC, from the County’s web portal, and via “walk-ins” from county departments including but not limited to DHCA. • SLA – to indicate the number of days in county business days the department has to fulfill the request. County business days must exclude weekends, county holidays and days when the county is closed due to inclement weather (snow days, etc) per CountyStat’s business requirement. This field has been published in the existing MC311 Service Requests dataset with the field name ‘Attached Solution SLA Days’. • +/- SLA –to indicate the number of days a service request is over or under SLA as is currently measured by CountyStat. The following 4 fields will be added to fulfill this line item  # of days open – Number of County Business days the Service Request has been opened.  Within SLA Window? - To indicate the number of days a service request is over or under SLA as is currently measured by CountyStat.  SLA Yes – Number of days to fulfill the service request is under the SLA window.  SLA No -– Number of days to fulfill the service request is over the SLA window.

  • API

    Daily Arrests

    data.montgomerycountymd.gov | Last Updated 2020-01-23T18:30:50.000Z

    This dataset provides the public with arrest information from the Montgomery County Central Processing Unit (CPU) systems. The data presented is derived from every booking; criminal, civil and motor vehicle entered through CPU. The data is compiled by “CRIMS”, a respected jail records-management system used by the Montgomery County Corrections and many other law enforcement agencies. To protect arrestee’s privacy, personal information is redacted. Residential addresses are rounded to the nearest hundred block. All data is refreshed on 2 hour basis to reflect any additions or changes. -Information that may include mechanical or human error -Arrest information [Note: all arrested persons are presumed innocent until proven guilty in a court of law - Records will be removed after 30 days. Update Frequency - every 2 hours

  • API

    MVA Electric and Hybrid Vehicle Registrations by County as of December 2019

    opendata.maryland.gov | Last Updated 2020-01-06T17:06:09.000Z

    Total number of electric and hybrid vehicles with active MD registrations by county as of December 2019

  • API

    Reported Sewer Overflows

    opendata.maryland.gov | Last Updated 2018-08-13T20:40:39.000Z

    Reported sewer overflows from January 2005 through December 22, 2016. Although MDE requires that all public sewer system owners or operators report overflows to us, there may be incidents that were not reported. Note that overflow amounts provided by the person reporting the overflow may be estimated using best professional judgment or they may be actual readings from flow measurement devices when available. Penalty information started during 2013.

  • API

    DOT Parking Tickets

    data.montgomerycountymd.gov | Last Updated 2020-01-22T15:55:26.000Z

    All parking citations issued by Montgomery County Department of Transportation (MCDOT) enforcement personnel in the Montgomery County Parking Lot Districts and Transportation Management Districts of Bethesda, Montgomery Hills, Silver Spring, Wheaton, North Bethesda, Friendship Heights, Greater Seneca Science Center and the Residential Permit Parking areas. This includes all on-street metered parking, public surface lots and public garages. The parking citations list the following: date/time, location, vehicle information, and description of the violation. Update Frequency: This data is updated annually.

  • API

    Montgomery College Enrollment Data

    data.montgomerycountymd.gov | Last Updated 2016-05-19T19:23:18.000Z

    Montgomery College Student Enrollment Data Update Frequency: Annually