Is Taylor a first name or a last name?

Taylor is both: a family name in some places and a given name in others. It is mostly a family name in the United Kingdom, Australia and New Zealand.

How to address someone called Taylor

United States. Taylor is used both ways: about 751,209 people had it as a surname in the 2010 census, and 423,606 babies born between 1950 and 2017 were given it as a first name. Look at where it sits in the name and how the person signs.
United Kingdom. Taylor is a family name, usually written last. Write Dear Mr. Taylor or Dear Ms. Taylor.
Canada. Taylor is used both ways: 79% of people from Canada with this name in our data carry it as a family name. Look at where it sits in the name and how the person signs.
Australia. Taylor is a family name, usually written last. Write Dear Mr. Taylor or Dear Ms. Taylor.

Not sure which part of a full name is which? Check the full name with the country where the person is based.

People recorded in Wikidata who carry Taylor as a family name or as a given name, by country of citizenship (4,229 in total).

Country	As family name	As given name	Family name share
United States	1,720	528	77%
United Kingdom	946	36	96%
Canada	299	81	79%
Australia	206	27	88%
New Zealand	151	7	96%
Ireland	23	0	100%
France	19	4	83%
South Africa	22	0	100%
Jamaica	17	1	94%
Germany	11	1	92%

Wikidata covers notable people, so counts show how the name is used, not how many people carry it.

As a surname: about 751,209 people in the 2010 census, rank 17 among US surnames.
As a first name: 423,606 babies born between 1950 and 2017, 75% of them girls.