There are lots of statitics available from different immigration agencies. Look on agency websites.
Examples
DHS: Immigration Data & Statistics
Includes the Yearbook of Immigration Statistics and other DHS statistics publications.
DOJ: Executive Office for Immigration Review: Statistics
Provides information about cases handled by IJs and the BIA.
USCIS Immigration and Citizenship Data
These reports provide data on various aspects of USCIS operations.
TRAC Immigration - Source for nonpartisan information about U.S. federal immigration enforcement - Border Patrol arrests, immigration court bond decisions, Immigration Judge reports.
Migration Policy Institute Data Hub provides national and state-level demographic, social, and economic facts about immigrants to the United States.
Immigration Policy Tracking Project "catalogues the known immigration policies of the Trump administration. Each entry contains underlying source documents, relevant predecessor policies, and the current status of each policy."