The Church reached 30,000 official congregations this month for the first time in its history. This milestone has taken a significant amount of time to reach due to decelerating congregational growth rates in the 2000s and early 2010s. The number of official congregations reached the 10,000 milestone in 1979 and the 20,000 milestone in 1992. Congregational growth has slightly accelerated in the mid-2010s although both numerical increases and percentage growth rates remain significantly less than in the 1980s and 1990s. In additional to official congregations, hundreds, if not thousands, of semi-official member groups also operate throughout the world.
For more information on LDS congregational growth rates, please refer to this article on cumorah.com.