By Paul Goodman
The result was declared some two hours later than expected. Is that related to the closeness of the result?
Mr Davies won 53% of the vote, defeating Nick Ramsay in a contest that had a 49% turnout. He will head the Conservatives' 14-strong group in the Welsh Assembly.
The contest was called after the former group leader Nick Bourne lost his seat in May's assembly election. Davies said:
"I'm a proud Welshman and a proud unionist and I feel bitterly disappointed when I look at the league tables on health, economic performance and education, and we see Wales propping those tables up, rather than leading from the top. We will be inspiring the people of Wales to reach for those heights that I know our communities can go for."
David Cameron said:
“I want to congratulate Andrew on his election as the leader of our party in the Welsh Assembly. Under Labour, Wales has become the poorest part of the UK, its education system is failing a generation and now Labour are making cuts of £1billion to the NHS. We must now offer a strong Conservative voice for Wales and I look forward to working closely with Andrew to deliver this and realise our strong ambitions for Wales."
Davies also paid tribute to both Bourne and Ramsay.
> Read Andrew's article for ConservativeHome in which he explained his vision for the Welsh Conservatives.