2026 Compare Cities People:
Watertown, SD vs Flagstaff, AZ

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Highlights
- Flagstaff is 0% more densely populated than Watertown.
- People are 35.4% less likely to be married in Flagstaff.
- The Median Age is 12.4 years younger in Flagstaff.
 Watertown, SDFlagstaff, AZUnited States
 Population  Unlock76,228329,725,481
 Female Population49.7%  Unlock50.5%
 Male Population50.3%  Unlock49.5%
 Median Age  Unlock25.838.4
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 Population - 201021,520  Unlock309,327,143
 Population - 2000  Unlock52,894285,036,114
 Population - 199017,592  Unlock251,960,433
 Pop. 2000 to Now  Unlock39.8%15.6%
 Pop. 1990 to Now26.8%  Unlock30.8%
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 Population Density  Unlock1,154.693.4
 Land Area18.0  Unlock3,531,905.4
 Water Area  Unlock0.1264,836.8
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 Est. Total Population By Age
 Watertown, SDFlagstaff, AZUnited States
 Age 0 to 45.9%  Unlock5.9%
 Age 5 to 9  Unlock4.8%6.1%
 Age 10 to 146.7%  Unlock6.6%
 Age 15 to 17  Unlock3.1%3.9%
 Age 18 to 204.2%  Unlock4.0%
 Age 21 to 24  Unlock11.4%5.2%
 Age 25 to 3413.6%  Unlock13.8%
 Age 35 to 44  Unlock10.7%12.9%
 Age 45 to 5410.8%  Unlock12.6%
 Age 55 to 59  Unlock4.1%6.7%
 Age 60 to 646.2%  Unlock6.3%
 Age 65 to 74  Unlock5.8%9.6%
 Age 75 to 845.3%  Unlock4.5%
 Age 85 and over  Unlock0.5%1.9%
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 Race
 Watertown, SDFlagstaff, AZUnited States
 White89.7%  Unlock59.4%
 Black  Unlock1.5%12.2%
 Asian0.7%  Unlock5.6%
 Native American  Unlock8.6%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.4%0.4%
 Two or More Races1.9%  Unlock3.2%
 Hispanic  Unlock18.9%18.4%
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 Marriage & Family
 Watertown, SDFlagstaff, AZUnited States
 Married Population51.2%  Unlock49.8%
     Currently Married  Unlock32.2%48.0%
 Married but Separated1.5%  Unlock1.8%
 Single Population  Unlock67.0%50.2%
 Never Married30.7%  Unlock33.8%
 Divorced  Unlock9.0%10.8%
 Widowed7.4%  Unlock5.6%
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 Household Size  Unlock2.402.60
 Households9,725  Unlock124,010,992
 Family Households  Unlock13,51980,755,759
     Married couple, w/children34.2%  Unlock30.5%
     Married couple, no children  Unlock41.3%42.9%
 Non Family Households4,163  Unlock43,255,233
     Single householder, w/children  Unlock15.5%15.8%
     Single householder, no children10.0%  Unlock10.8%
Reviews for Watertown    5 Reviews

Let me start by saying that I've lived all over the US and spent 3 years in Watertown. On the positive side, Watertown has a lot to offer for a town of 22,000 people.   More

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Many lakes with in driving distances and many public hunting areas but if your looking for the night life its not here this is a small town  More

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Watertown in general has alot of old people, if your in Downtown and watch cars go by it seems as though every other car has a elderly person in it. But apart from all  More

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Reviews for Flagstaff    50 Reviews

Amber · 

Flagstaff is absolutely the perfect place to call home. Especially for families. 4 perfectly balanced seasons. None too extreme and all beautiful. Ridiculously safe!  More

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Leah · 

I've lived here for one year and have to move because the cost to rent here is astronomical. I've been paying $2550/month and now for a comparable home it is $2900 and  More

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Every place depends on what you are looking for. So I will say a bit about me so you can assess where the review is coming from. I am a professional, single, female  More

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