The hard-right Alternative for Germany (AfD) has become the most popular party in the country, according to the results of a new poll.

The anti-immigration AfD, led by Alice Weidel, now has 26 per cent support, while approval rates for the German Chancellor, Friedrich Merz, have plummeted 100 days since his election.

As popularity for Weidel's party surged, the poll found that 67 per cent of the country were dissatisfied with Merz's performance, particularly among AfD supporters.

Only 29 per cent of respondents were satisfied with his work - marking the lowest point in the Chancellor's popularity since he was elected in May.

Meanwhile, support for Merz's mainstream conservative bloc - the Christian Democratic Union of Germany (CDU) and Christian Social Union in Bavaria (CSU) alliance - fell to 24 per cent, according to the poll carried out by the Forsa Institute for Social Research and Statistical Analysis.