City of Somerville, MA GIS Viewer

This dataset includes data starting in July 2015. This dataset was updated in November 2023 to include Feedback and Information Requests in addition to Service Requests. Please redownload the data for the most up to date information. This dataset will be updated monthly.

Somerville at a Glance is an introduction to Somerville's population, housing, education, home value and other demographic trends over time and compared to Massachusetts as a whole. The current version uses Census and ACS data from 2010 to 2023.

description: The State Department of Revenue (DOR) has approved assessed values for Fiscal Year (FY) 2016 for the Somerville Board of Assessors. The assessed values and data presented relects information available for the FY 2016 actual tax bill issued around January 1, 2016. Assessments for FY 2016 have an effective market date of January 1, 2015. Note that ownership information shows record owner as of January 1, 2015. However, a second line of owneship, if applicable, showing "S/O" indicates a subsequent owner who purchased the property after January 1, 2015 but prior to January 1, 2016. In this instance, title information including sale price, sale date, and book & page will not appear in the data base until next year or for the third quarter tax bill for FY 2017 issued around January 1, 2016. New ownership information is provided through about early October of 2015.; abstract: The State Department of Revenue (DOR) has approved assessed values for Fiscal Year (FY) 2016 for the Somerville Board of Assessors. The assessed values and data presented relects information available for the FY 2016 actual tax bill issued around January 1, 2016. Assessments for FY 2016 have an effective market date of January 1, 2015. Note that ownership information shows record owner as of January 1, 2015. However, a second line of owneship, if applicable, showing "S/O" indicates a subsequent owner who purchased the property after January 1, 2015 but prior to January 1, 2016. In this instance, title information including sale price, sale date, and book & page will not appear in the data base until next year or for the third quarter tax bill for FY 2017 issued around January 1, 2016. New ownership information is provided through about early October of 2015.

ESRI polygon feature class representing City of Somerville, Massachusetts building footprints. Last updated July 5, 2024.

Contains view count data for the top 20 pages each day on the Somerville MA city website dating back to 2020. Data is used in the City's dashboard which can be found at https://www.somervilledata.farm/.

This dataset provides information about the number of properties, residents, and average property values for Church Street cross streets in Somerville, MA.

Somerville Public Schools partnered with the City’s Office of Strategic Planning and Community Development to launch the Somerville Public Schools Workforce Transit Pass Pilot Program for Spring 2023. This program was funded thanks to the American Rescue Plan Act. The pilot program provided free MBTA LinkPasses to all SPS staff who signed up. Passes were good 7 days a week for unlimited travel on all MBTA subway lines, local bus lines, and the Silver Line. The goal of the pilot was to support staff, promote sustainable transit, ease parking pressure around schools, and evaluate use and interest in transit passes. This dataset includes anonymized travel data provided by the MBTA combined with select survey responses from the pilot intake survey.

Every two years, the City of Somerville sends the Somerville Happiness Survey to a random sample of Somerville residents. The survey asks residents to rate their personal happiness, wellbeing, and satisfaction with City services. This combined dataset includes random-sample survey results from 2011 to 2023, including all 2023 questions with applicable responses from previous years. A data dictionary, exploratory visualization, and survey instruments are attached.

This dataset provides information about the number of properties, residents, and average property values for School Street cross streets in Somerville, MA.

ESRI polygon feature class representing City of Somerville, Massachusetts neighborhood boundaries.

City of Somerville, MA GIS Data Catalog

The State Department of Revenue (DOR) has approves assessed values each fiscal year for the Somerville Board of Assessors. The assessed values and data presented reflects information available for the FY 2014-2019 actual tax bills issued January 1 of each year. Assessments for each fiscal year have an effective market date of January 1 of the preceding year. Note that ownership information shows record owner as of January 1. However, a second line of ownership, if applicable, showing "S/O" indicates a subsequent owner who purchased the property after January 1 but prior to the following assessment. In this instance, title information including sale price, sale date, and book & page will not appear in the data base until next year.

Polygon feature class representing the City of Somerville, Massachusetts zoning map adopted December 12, 2019 as part of the City of Somerville Zoning Overhaul (https://www.somervillezoning.com/). Last amended by City Council December 12, 2024 per Ordinance 2024-16. This dataset last updated April 4, 2025.

This dataset contains crime reports from the City of Somerville Police Department's records management system from 2017 to present. Each data point represents an incident, which may involve multiple offenses (the most severe offense is provided here). Incidents deemed sensitive by enforcement agencies are included in the data set but are stripped of time or location information to protect the privacy of victims. For these incidents, only the year of the offense is provided. This data set is refreshed daily with data appearing with a one-month delay (for example, crime reports from 1/1 will appear on 2/1). If a daily update does not refresh, please email data@somervillema.gov.

ESRI point feature class representing City of Somerville, Massachusetts street trash and recycling receptacles. Contact Keith Johnson (kjohnson@somervillema.gov) with any questions.

This dataset provides information about the number of properties, residents, and average property values for Bartlett Street cross streets in Somerville, MA.

About this dataset

Context

The dataset tabulates the Somerville population distribution across 18 age groups. It lists the population in each age group along with the percentage population relative of the total population for Somerville. The dataset can be utilized to understand the population distribution of Somerville by age. For example, using this dataset, we can identify the largest age group in Somerville.

Key observations

The largest age group in Somerville, MA was for the group of age 25 to 29 years years with a population of 15,716 (19.51%), according to the ACS 2019-2023 5-Year Estimates. At the same time, the smallest age group in Somerville, MA was the 80 to 84 years years with a population of 686 (0.85%). Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates

Age groups:

• Under 5 years
• 5 to 9 years
• 10 to 14 years
• 15 to 19 years
• 20 to 24 years
• 25 to 29 years
• 30 to 34 years
• 35 to 39 years
• 40 to 44 years
• 45 to 49 years
• 50 to 54 years
• 55 to 59 years
• 60 to 64 years
• 65 to 69 years
• 70 to 74 years
• 75 to 79 years
• 80 to 84 years
• 85 years and over

Variables / Data Columns

• Age Group: This column displays the age group in consideration
• Population: The population for the specific age group in the Somerville is shown in this column.
• % of Total Population: This column displays the population of each age group as a proportion of Somerville total population. Please note that the sum of all percentages may not equal one due to rounding of values.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for Somerville Population by Age. You can refer the same here

This dataset provides information about the number of properties, residents, and average property values for Summer Street cross streets in Somerville, MA.

ESRI polygon feature class representing the City of Somerville, Massachusetts open space areas including parks, playgrounds, recreation fields, community gardens, cemeteries, natural areas, and other open space types.