The Virginia Demographics based on exit polls.

[Honeycombe8]

The votes are NOT all counted yet. There are no "official" demographic numbers yet. That will come in time. I'm sure the Democratic Party is going to study what happened here, so it can try to repeat this huge win in the 2018 mid-terms.

In the meantime, we have some soft numbers based on exit polls. They are here:
https://www.washingtonpost.com/graphics/2017/local/virginia-politics/governor-exit-polls/?utm_term=.46d0c89f5008

Northam beat Clinton in almost every demographic, sometimes by a tad, sometimes by quite a bit.

[frazzled]

2. Exit polls are pretty much all there is for determining demographics

aside from census data, which would reveal that a certain district or ward is largely Hispanic, for example; or largely young.

Demographics can't be determined from raw votes alone: your vote is anonymous, so the numbers alone can't determine if someone is married or single, or black or white, or female or male, or young or old.

Demographics, I believe, are always drawn from exit polls and/or census data.

[Honeycombe8]

3. Oh, no. Your vote is not anonymous in some states.

When I was in TX, you could look me up and see whether I'd voted D or R in major elections for some years. Remember when the administration wanted the states to provide info to the fed? That's one of the things they were looking for...and some states have it.

I got letters in Dallas (where you don't register to a party)...I got letters from strangers, noting that I had voted Democratic.

Now I'm in Louisiana. La. has a variety of info it sells to telemarketers and other politicians. You register to a party here, also. I think the voting records of voters go back some years here; the state has that info.

[frazzled]

4. That's only in primaries, where you request a D or R ballot

And that doesn't mean an individual votes for the D (or R) candidate in a general election.

[Honeycombe8]

5. Your VOTE is recorded for key races.

It may not record WHO you voted for. But it records the PARTY you voted for, for key races. Main reason being, someone reading that info later wouldn't necessarily know who Jim Smith was, and it would also require a lot of editing to electronically sort the data, if it had names you voted for instead of party.

I remember once looking online at my precinct, to see how my precinct voted. There was the precinct voting record in chart form, for general viewing. Every person's name and who s/he voted for. Other info, too, I guess, but I don't remember. I imagine it was a printout of the electronic voting machines. This can be used, I suppose, for confirming votes.

I am now in La. Louisiana keeps, and sells, Parish, Name, Ward, Precinct, Party, Residence & Mailing Addresses, Sex, Race, Age, Status, Registration Date, Registration #, Last 20 Dates Voted, & District information, phone numbers.

[frazzled]

6. Believe that if you want

But that's not how demographic information on age, race, gender, or any other factor can be captured.

[Honeycombe8]

7. I accept that. I don't KNOW how they come up with the demographics for all elections...

I think some are not available.

I'm just saying there IS electronic data that can provide that, to some degree, with the advent of electronic voting.

I saw with my own eyes my precinct's voting online, so I know it was there for all to see, whoever cared. They didn't keep it online for long. I think one reason it was there so people could check and make sure their vote was recorded & recorded correctly.

How the Census would get the demographics, I don't know.