This post is actually in answer to a question I got from jwfacts. I think the issue was also raised on a recent thread.
First, some data from the 2011 and 2016 censuses:
Basically, that data shows that compared to the overall population, JW's are a little less likely to be divorced, but they are quickly catching up with the rest of the population in this regard. The data shows that they are a little more likely to be separated. The higher rate of being widowed is almost certainly because as a group they are significantly older than the population.
The divorce rates of JW's compared to selected other religions can be summarized in the following table:
I included Anglican to be fair. The Anglicans in Australia are predominantly old, and historically had a more relaxed attitude to divorce than other religions. JW's fare worse than all the other religions shown. Again to be fair, apart from the Anglicans, JW's are typically older than members of those other religions, and that has an effect. I have a way of cancelling that effect out, but I would probably confuse everyone with my methodology. I included numbers for Hindu and Islam, but those numbers are partially a reflection of Aust immigration rules, and so are not a fair comparison.
The "take home message" is that divorce and separation rates for JW's are pretty typical of what you would find in "Christendom".
De facto marriages are far fewer amongst JW's. I won't put up the charts but the numbers in brief are that:
(a) 1,751,733 (7.5% of population) reported being in a de-facto couple on census night, but
(b) only 1,323 (1.6% of JW's) reported being JW's in a de-facto couple.
Interestingly, while for the general population, 95% of those in a de-facto couple spent census night in the same house as their partner, only 79% of JW's in a de-facto couple spent census night in the same house.
For the general population, 5.7% of those de-facto couples were same sex couples. For those claiming to be JW's 3.8% of those de-facto couples were same sex couples. To put it another way, 18 males and 20 females:
(a) wrote on their census form that they were Jehovahs Witnesses (there is no separate box to tick accidentally); and
(b) reported that they were spending census night with someone of the same sex as a de-facto couple.