The population of Williamson county is estimated at 527,769. In 2017 there were 6,714 births and 2,751 deaths in Williamson county. Williamson county has 86,009 housing units that are owned with a mortgage or a loan, 19,775 that are owned free and clear and 46,822 that are renter occupied.

  The residents of Williamson County filed 246,490 federal tax returns in 2017. This amount represents 2.0% of all Texas filings and 0.165% of the entire nation. Williamson had an impressive combined total federal tax liability of $2,865,781,000 on earned income of $18,644,701,000. Other notable statistics from Williamson County were 6,630 unemployment claims which collected a total of $35,602,000 and 66,870 charitable contributions valued at $315,625,000. 78,030 filings from Williamson County paid a combined total of $533,651,000 in property taxes and 70,630 filings paid $546,686,000 on mortgage interest costs.

  In 2010 Williamson county had 300 religious congregations with an estimated 158,412 members.
40.2% of the Williamson population has a college level Bachelors degree or higher. 7.0% have less than a highschool diploma level education.

About 38% of Williamson County voted in the presidential election of 2016. This represents an increase from the 2012 election by 37,588 votes.
At $82,131 the median income is 138.7% of the Texas average. An estimated 9,259 people claimed to be unemployed last year in Williamson, the equivalant of around 3.2% of the county population. This represents a decrease in the level of unemployment from the previous year's value of 3.4%.

Top 15 Industries in Williamson County.
Total # Employed	Industry Job Type
21,844	Retail trade
16,410	Health care and social assistance
15,477	Accommodation and food services
14,677	Food services and drinking places
13,964	Restaurants and other eating places
7,644	Administrative and support and waste management and remediation services
7,490	Professional, scientific, and technical services
7,485	Manufacturing
7,425	Administrative and support services
7,405	Ambulatory health care services
7,092	Finance and insurance
6,835	Full-service restaurants
6,187	Limited-service restaurants
4,107	Other services (except public administration)
3,857	General merchandise stores

In 2018 the average price reduction was 1.87% in Williamson County (averaging across 10 zip codes a sample of which are; 78626, 78628, 78665, 78641 and 78681).

In 2018 20.68% of listings in Williamson County (averaging across 11 zip codes a sample of which are; 78634, 78628, 78664, 78626 and 78665) dropped their price.

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