The following is a timeline of the first presidency of Donald Trump during the first quarter of 2019, from January 1 to March 31, 2019. For a complete itinerary of his travels, see List of presidential trips made by Donald Trump (2019). To navigate between quarters, see timeline of the Donald Trump presidencies. For the Q2 timeline see timeline of the first Trump presidency (2019 Q2).
The first quarter of 2019 began with the continuing government shutdown which had begun on December 22; it lasted until January 25.