Genealogy Gems Premium Podcast Episode 171
Premium Episode 171 Highlights from this episode include: Mapping cemetery history One minute around the web Managing web browser bookmarks for more efficiency Using YDNA for genealogy – includes downloadable handout! US Census history Download the audio file...1950 US Census Maps – How to Find and Use Them
In Elevenses with Lisa episode 79 Lisa Louise Cooke explains:
- How to find 1950 US Census Enumeration District (ED) Maps
- The purpose behind them and how to interpret the maps
- Ways to use the maps for your genealogy
This is a follow up to episode 51 on The 1950 Census for Genealogy. In that episode I discussed the importance of finding your ancestors’ enumeration district numbers in order to be able to find them when the digitized images are released (before the index is available.) In this episode I will walk you through how to locate the enumeration district (ED) number and then find the actual 1950 US Census ED map. We’ll wrap things up with a quick update on the release of the 1950 US Federal Census.
Episode 79 Show Notes
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As I mentioned in Elevenses with Lisa episode 51 The 1950 Census for Genealogy, prior to 1880, U.S. Marshalls were the enumerators for the federal decennial census. Starting with the 1880 census enumerators were hired and they were each assigned an enumeration district, also known as an ED. These districts had to be mapped out so that the enumerators knew the area they were responsible for counting. Therefore, maps are drawn in anticipation of each census being taken, including the 1950 census.

Learn more by watching episode 51 on the 1950 census.
About the 1950 US Census Maps
It’s always important to understand the purpose of a record or source, and the 1950 Enumeration District maps (ED maps) are no exception. Unlike most maps where it’s all about accurately drawing up the current roads and geographical features, census ED maps are drawn up for the purpose of defining boundaries for the purpose of counting people. This means as we look at ED maps we need to keep a few things in mind.
The first thing to understand is that the 1950 ED maps were not necessarily up-to-date with the lay of the land in 1950. Not all streets, parks and features will be included. The reason for this is that the maps themselves were not created for this purpose. Existing maps were used and then enumeration district boundaries were drawn on them.
Maps came from a variety of sources including but not limited to county and City Planning Commissions, 1940 census bureau tract maps, and city engineers. In fact, from a mapping perspective the variety of maps in the collection are fascinating.
Look for the map title, description, legend and census stamps typically found in one of the corners. In this example (see image) from Aurora, Colorado the map used was originally created by the city engineer in 1946 and was revised in 1947.

1950 census map of Aurora, Colorado (Source: National Archives)
Following the end of World War II, the United States was growing at a quick pace in 1950. This is particularly true of the newly emerging suburbs. Therefore, if your ancestors built a new home in a new development in 1949, don’t be surprised if you don’t see the street on the 1950 census ED map. However, rest assured that the maps still hold value for your family history as they provide many interesting and unique details about the area surrounding your ancestors’ homes.
Each map was stamped with a small legend where the meaning for each of the colored lines drawn could be indicated. From my random sampling of 1950 census maps across the United States it appears that the coloring coding was consistent as follows:
- Red = Township
- Green = Corporate Limits/Ward
- Orange = Enumeration District
Expect to see errors, inconsistencies and omissions in the maps. The more rural the area the more likely the map was compiled from several sources by the Census Bureau cartographers. This compilation created more opportunity for errors, and often used older maps.

Source: National Archives
The Meaning of Census Enumeration District Numbers
A census enumeration district number is made up of two numbers separated by a dash. The first number (in this example: 1) represents the county/region. The second number represents the area within the county that could be covered by an individual census enumerator within the amount of time provided for taking the census, about 2-4 weeks. The official start of the 1950 US Federal Census was April 1, 1950.

Census enumeration district (ED) numbers on a 1950 census map.
How to Find 1950 Census Maps
Some 8,000 census maps have been digitized and are available at the National Archives. However, the National Archives website can be challenging to navigate. I recommend using the Unified 1880-1950 Census ED Finder Tool at Steve Morse’s website.
1. Go to https:/stevemorse.org
2. In the menu in the upper left corner hover over US Census and in the secondary menu click Unified 1880-1950 Census ED Finder
3. Select the state from the first drop-down menu.
4. Next select the county.
5. Then select the city.
6. You will then see many enumeration district links listed. In order to find the right one for your ancestor’s home, enter the house number and select the street from the next drop-down menu. Don’t worry about directional parts of the address like west or east unless they are offered in the list of street names.
7. As soon as select the street name, the list of ED numbers should be reduced. In this example we are down to three.
8. To further reduce the possible ED numbers, we can select Cross or back street on same city block. If you’re not sure what the neighboring streets are, click the see Google Map This will plot the address you entered into Google Maps where you can then find the closest cross street, and the next streets over. If the address is not precisely marked on the map, check the address that appears in the Google Maps search box.
In my case, the One-Step tool didn’t allow me to specific W. Arcade, so Google Maps just gave me the general area, and not the address. By adding the W. to the address and pressing enter on my keyboard Google Maps was able to precisely plot the location. Now we can make note of the closest cross street (ex. N. Center), the street north of the address (E. Monterey Ave.) and the street south of the address (W. Noble St.)
9. Head back to the Unified 1880-1950 Census ED Finder page and enter each nearby street (you can enter multiple.) This should reduce the ED numbers one. This is the ED that includes your ancestor’s address.
How to Find 1950 Census Maps
1. Make note of the ED number, and then go back and click the button that says See ED Maps for ____________ County. You could have clicked this button without going through the process of locating the ED number, but the ED number makes it much easier to find your ancestor’s home street on the map. This number will also assist you in being able to find your ancestors in the 1950 census before it is indexed.
2. You will now be on the Viewing 1950 Enumeration District Maps in One Step Re-enter the city from the drop-down menu.
3. Click the Get ED Map Images You will receive two links. The first link is Links to NARA viewer will take you to the page on the National Archives website which includes all of the information about the map and the record hierarchy. Source citation information can be gathered from this page.
5. Click the second link called Direct links to jpegs on NARA server. This will take you to the image by itself as hosted on the National Archives website. I find this the easiest way to save the full resolution image to my computer hard drive. On my PC I right-click on the map and select Save Image As.
This page is also important if you want to use this image in another program such as Google Earth. The URL for this page is the direct URL to the image. Notice that it ends in .jpg. This means that it is the image alone, and this link can be used to create a custom map overlay in Google Earth. You can see an example of a custom map overlay in my video Create a Family History Tour with Google Earth Pro at the 06:13 mark.
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Premium Episode 21 – Cold Cases Part 3
AncestryDNA Works Toward Genetics + Genealogy Integration
The ideal genetic genealogy interface creates a seamless transition between genetics technology and genealogical research findings. Most currently available tools are either DNA technology without much genealogy, or genealogy without much DNA technology. AncestryDNA is really pioneering the genetic and genealogical integration with its newest AncestryDNA product update.
The goal of genetic genealogy is to aid your traditional research by verifying known connections and providing clues to as yet unknown ancestors. DNA was never meant to replace traditional research methods, nor has it ever claimed that ability. Rather, it is meant to aid your traditional research by verifying known connections and providing clues to as-yet unknown ancestors.
I admit, I dream of a future technology so precise that it pinpoints the locations of ancestors and defines our exact relationships to others. While we are not there yet, many have experienced a genetic test’s power to obliterate previously-held beliefs about relationship and heritage, and create new intricate and personal relationships where before there were only blank spaces. In this sense, genetic genealogy can be viewed as a kind of police force of the genealogy world, righting wrongs and taking names. But I digress.
For now, the ideal must remain a seamless transition between genetics technology and traditional research results, so that the two so completely complement each other that we can’t see where one stops and the other begins. Yet the two worlds are often separated by a chasm of misunderstanding and just plain ignorance. Of the three testing companies, two are making mediocre efforts at best to try to help you incorporate your genetics into your genealogy. They are basically dishing out a serving of genetics, offering a vending machine of genealogy snacks and calling it a full meal.
With one exception.
AncestryDNA has put genetic and genealogical integration at the forefront of its product. They are the only company making a serious effort to integrate your genetics and your genealogy. To be successful, they need two things: tons of people and their genealogy. The more people test, the better the database becomes. Not just in terms of the matches you find, but also in terms of statistics and the power that numbers have to solve complex problems, like relatedness.
So, how do they get more people interested in genetic genealogy?
This reminds me of my early days at Relative Genetics, one of the first genetic genealogy companies. I was fresh out of college and tasked with training our CEO, CFO, QA director, and marketing director about what exactly it was that we did as a genetic genealogy company. None of these men had any experience in genetics or genealogy. In those meetings as we were trying to figure out ways to grow our company in an unknown industry, I felt like I was the constant downer to the party. As a scientist I had been trained that there are no absolutes. Whenever we talk about outcomes it is always in terms of “most likely” or “less likely” and to never, ever say “always.” So when they would get excited about an idea and propose wording for an ad campaign, I was always reining them in.
After reading a recent announcement by AncestryDNA, I feel like their marketing department had a meeting on the day their scientific advisor was out sick and without his or her corralling, they started a stampede.
Which, of course, was exactly what they wanted.
In their press release, Ancestry’s Dr. Ken Chahine, SVP and GM of AncestryDNA said, “It is effectively a shortcut through time—you take the test today and we tell you who your ancestors were, for example, in the 1700s. You don’t need to research records or build a family tree — AncestryDNA now transports you to the past.”
Which is exactly what people want to hear, especially non-genealogists who are curious about their past, but don’t have the tools or know-how or interest in doing the actual genealogy work.
But is it true? Is genetic genealogy a short cut through time?
“Absolutely,” says the marketing team.
“Sometimes, and that depends on factor A, and factor B and situation C and…” say the scientists.
And they are both right. The trick is to hear them both as you review these kinds of new advances in genetic genealogy.
What makes the “absolutely” true is that one of the dreams of genetic genealogy is to use the DNA of living people today to actually reconstruct the genetics of our ancestors. So that their actual DNA profile is known. Then it will be easy to identify their descendants as we will be able to see immediately what part of our DNA came from which of our ancestors. Ancestry has demonstrated their ability to do this in a large scale study of the descendants of a 19th-century American and his two successive wives.
Now, time for the “Sometimes.” This full genome reconstruction hasn’t been done yet for your grandparents, or great grandparents. Right now the best we can do is use your DNA to link you to living individuals, then rely on your traditional genealogy to help you find your common ancestor. Ancestry is trying to help you do that using their DNA circles, and now with their New Ancestor Discoveries.
Remember that to be included in a DNA circle you have to have a “ticket” to the party, meaning both your genetics and your genealogy match with at least two other people in the database and a circle is created around the host of the party, who is your common ancestor.
With New Ancestor Discoveries, we are letting those with just a genetic ticket into the party. Meaning that if you share DNA with two or more people in a DNA Circle, the host of that circle is named as an ancestor who might be on your pedigree chart.
Did you notice how I said “might?” That this newly discovered ancestor MIGHT be in your pedigree chart?
As an idea, New Ancestor Discoveries is VERY EXCITING, don’t you think? To be able to find out using both genetics and genealogy that a particular person living 100 years ago might just be the one who belongs in that blaring blank space on your pedigree chart? And it will be. But right now, Ancestry needs to work out some bugs, starting with a stronger acknowledgement that the ancestor listed in the Discoveries is by no means an absolute, but just a hint.
In coming posts I will share with you how I am using the New Ancestry Discoveries to discover more about my genealogy, even if it isn’t exactly in the way Ancestry intended. For now, learn more by reading my recent posts: from the left side of the Genealogy Gems home page, search on the category “DNA.”
And click here to visit my website and learn more about how I can help you navigate the exciting world of genetic genealogy.