From Poland, visitors can apply for a visa through one of the embassy of Vietnam in Poland below or apply for a Vietnam visa  online. Here below is the specific address of Vietnam Embassy you may concern:

Embassy of Vietnam in Warszawa – Poland
Kazimierzowska 14, 02-589 Warszawa, Poland
Tel: (4822) 844 6021 (4822) 844 3780 (4822) 844 6035
Fax: (4822) 844 6723

Besides, citizens in Poland can select among 3 options to get visa to Vietnam:

–          Visit Vietnam Embassy in Poland or in any other countries to get Vietnam visa done there.

–          Apply for Vietnam visa on arrival at https://vietnamvisaonentry.com/apply-online/ and pick up your visa at one of 3 international airports in Vietnam

–          Apply for Vietnam visa code at https://vietnamvisaonentry.com/apply-online/ and get visa stamped at Vietnam Embassy where you wish to pay a visit to.