Why women — especially older women — rule in Washington State
Out of the 4.6 million registered voters in Washington State, 2.4 million (51.9%) are female.
Out of the 3.4 million active registered voters (meaning they’ve voted since 2012), 2.4 million (52.8%) are female.
Women rule — or at least decide who rules — in Washington State.
Furthermore, older people vote at much higher numbers than younger voters.    The following graph shows the number of registered voters by age of birth.
There are drop-offs for elderly people born before 1950, for the newly eligible people born since 1990, and for the double dip around 1970 — presumably the generation between the baby boomers and their children. But aside from these drop-offs, the number of registered voters is rather flat. However, the number of active voters (who have voted since 2012) shows a marked preference for the older voters:
Young people need to vote more!
(Note: I gathered these stats from the voter registration database that I downloaded from the Washington State Secretary of State’s office.)
If we consider elderly active voters, the bias towards women is more extreme. There are 799 thousand active female voters who were born before 1960. There are 703 thousand active male voters born before 1960.  So 53.1% of active elderly voters are female.
Some other interesting stats: King, Pierce, and Snohomish Counties have over half the registered voters in Washington State. Female voters outnumber male voters 711 thousand to 673 thousand in King County.
Here are the numbers of registered voters by county.
+------------+----------+----------------------+ | CountyCode | # Regs | Percent of total | +------------+----------+----------------------+ | KIÂ Â Â Â Â Â Â Â |Â 1386134 |Â Â Â Â Â Â Â Â Â Â Â Â Â 29.8783 | | PIÂ Â Â Â Â Â Â Â |Â Â 534848 |Â Â Â Â Â Â Â Â Â Â Â Â Â 11.5287 | | SNÂ Â Â Â Â Â Â Â |Â Â 494310 |Â Â Â Â Â Â Â Â Â Â Â Â Â 10.6549 | | SPÂ Â Â Â Â Â Â Â |Â Â 332249 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 7.1617 | | CRÂ Â Â Â Â Â Â Â |Â Â 301612 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 6.5013 | | THÂ Â Â Â Â Â Â Â |Â Â 192481 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 4.1490 | | KPÂ Â Â Â Â Â Â Â |Â Â 180618 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 3.8932 | | WMÂ Â Â Â Â Â Â Â |Â Â 149761 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 3.2281 | | YAÂ Â Â Â Â Â Â Â |Â Â 121799 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 2.6254 | | BEÂ Â Â Â Â Â Â Â |Â Â 111978 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 2.4137 | | SKÂ Â Â Â Â Â Â Â |Â Â Â 78947 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1.7017 | | CZÂ Â Â Â Â Â Â Â |Â Â Â 70074 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1.5105 | | ISÂ Â Â Â Â Â Â Â |Â Â Â 60167 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1.2969 | | CMÂ Â Â Â Â Â Â Â |Â Â Â 54836 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1.1820 | | LEÂ Â Â Â Â Â Â Â |Â Â Â 49506 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1.0671 | | GYÂ Â Â Â Â Â Â Â |Â Â Â 47050 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1.0142 | | CHÂ Â Â Â Â Â Â Â |Â Â Â 45999 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.9915 | | GRÂ Â Â Â Â Â Â Â |Â Â Â 45724 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.9856 | | MAÂ Â Â Â Â Â Â Â |Â Â Â 40770 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.8788 | | FRÂ Â Â Â Â Â Â Â |Â Â Â 38318 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.8259 | | WLÂ Â Â Â Â Â Â Â |Â Â Â 36834 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.7940 | | STÂ Â Â Â Â Â Â Â |Â Â Â 32640 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.7036 | | KSÂ Â Â Â Â Â Â Â |Â Â Â 26991 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.5818 | | JEÂ Â Â Â Â Â Â Â |Â Â Â 26713 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.5758 | | WTÂ Â Â Â Â Â Â Â |Â Â Â 25873 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.5577 | | OKÂ Â Â Â Â Â Â Â |Â Â Â 24325 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.5243 | | DGÂ Â Â Â Â Â Â Â |Â Â Â 21702 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.4678 | | ASÂ Â Â Â Â Â Â Â |Â Â Â 16504 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.3557 | | KTÂ Â Â Â Â Â Â Â |Â Â Â 15786 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.3403 | | PAÂ Â Â Â Â Â Â Â |Â Â Â 15230 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.3283 | | SJÂ Â Â Â Â Â Â Â |Â Â Â 13506 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.2911 | | PEÂ Â Â Â Â Â Â Â |Â Â Â 10116 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.2181 | | SMÂ Â Â Â Â Â Â Â |Â Â Â Â 8097 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.1745 | | LIÂ Â Â Â Â Â Â Â |Â Â Â Â 7402 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.1596 | | ADÂ Â Â Â Â Â Â Â |Â Â Â Â 7175 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.1547 | | FEÂ Â Â Â Â Â Â Â |Â Â Â Â 5170 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.1114 | | WKÂ Â Â Â Â Â Â Â |Â Â Â Â 3231 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.0696 | | CUÂ Â Â Â Â Â Â Â |Â Â Â Â 3011 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.0649 | | GAÂ Â Â Â Â Â Â Â |Â Â Â Â 1780 |Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.0384 | +------------+----------+----------------------
Though King County has lots of registrations, its turnout is lower than many other counties. Here’s a table showing turnout by county (again, voters are those who have voted since 2012).
+------------+---------+------------+-----------------+ | CountyCode | Active | Registered | Percent turnout | +------------+---------+------------+-----------------+ | SJ        |  11667 |    13506 |    86.4%      | San Juan County | LI        |   6238 |     7402 |    84.3%      | Lincoln County | JE        |  22170 |    26713 |    83.0%      | Jefferson County | CU        |   2468 |     3011 |    82.0%      | | GA        |   1445 |     1780 |    81.2%      | | WK        |   2585 |     3231 |    80.0%      | | CM        |  43310 |    54836 |    79.0%      | | ST        |  25683 |    32640 |    78.7%      | | FE        |   4064 |     5170 |    78.6%      | | SK        |  61914 |    78947 |    78.4%      | | IS        |  46750 |    60167 |    77.7%      | | OK        |  18873 |    24325 |    77.6%      | | PA        |  11811 |    15230 |    77.6%      | | WM        | 115759 |   149761 |    77.3%      | | KS        |  20795 |    26991 |    77.0%      | | CH        |  35344 |    45999 |    76.8%      | | MA        |  31242 |    40770 |    76.6%      | | SM        |   6197 |     8097 |    76.5%      | | BE        |  85388 |   111978 |    76.3%      | | WL        |  28073 |    36834 |    76.2%      | | PE        |   7678 |    10116 |    75.9%      | | LE        |  37463 |    49506 |    75.7%      | | KI        | 1046928 |  1386134 |    75.5%      | | KP        | 136283 |   180618 |    75.5%      | | KT        |  11876 |    15786 |    75.2%      |  King County | SN        | 370888 |   494310 |    75.0%      |  Snohohomish County | WT        |  19396 |    25873 |    75.0%      | | SP        | 248881 |   332249 |    74.9%      | | DG        |  16072 |    21702 |    74.6%      | | AD        |   5229 |     7175 |    72.9%      | | TH        | 140214 |   192481 |    72.8%      | | PI        | 388218 |   534848 |    72.6%      | Pierce County | CR        | 216499 |   301612 |    71.8%      | | CZ        |  49609 |    70074 |    70.8%      | | GY        |  33155 |    47050 |    70.5%      | | YA        |  85157 |   121799 |    69.9%      | | GR        |  31583 |    45724 |    69.1%      | | AS        |  11031 |    16504 |    66.8%      | | FR        |  25400 |    38318 |    66.3%      | +------------+---------+------------+-----------------+
The following image shows turnout by zipcode in Washington State.
Earlier this year, in How does voter turnout vary with income?, I showed the degree to which wealthy people vote more than poorer people. I reproduce the relevant graph below. (Click on it for a larger version.)
There is a trend in the graph: the richer zipcodes (on the right) tend to have higher turn out (towards the top). That’s why the graph tends towards the upper right. There are exceptions — zipcodes with lower income and higher turnouts.
You can also see to which voters tend to be older and female from the following chart from the Secretary of State’s office, showing voter turnout in the 2014 election:
Age Gender Number of Voters 18 - 24 years Female 174801 18 - 24 years Male 167837 18 - 24 years UnKnown 376 18 - 24 years Total 343014 25 - 34 years Female 331861 25 - 34 years Male 304675 25 - 34 years UnKnown 410 25 - 34 years Total 636946 35 - 44 years Female 322444 35 - 44 years Male 300368 35 - 44 years UnKnown 369 35 - 44 years Total 623181 45 - 54 years Female 365392 45 - 54 years Male 343584 45 - 54 years UnKnown 345 45 - 54 years Total 709321 55 - 64 years Female 392350 55 - 64 years Male 359749 55 - 64 years UnKnown 372 55 - 64 years Total 752471 65 and over Female 461011 65 and over Male 396921 65 and over UnKnown 414 65 and over Total 858346 Grand Total 3923279
In short, older people, rich people, and females tend to be the people who vote most.
According to the Secretary of State’s Voting Participation Statistics, in the 2012 elections, 60.8% of the voting age population voted. In the midterm elections of 2014 only 39.5% of eligible people voted.