Willem van der Kaay

{{Short description|Dutch judge and politician}}

{{Expand Dutch|topic=gov|date=April 2010|Willem van der Kaay}}

{{Infobox officeholder

| name = Willem van der Kaay

| image = Willem van der Kaay.jpg

| alt =

| caption =

| birth_name = Willem van der Kaaij

| birth_date = 5 May 1831

| birth_place = Alkmaar, Netherlands

| death_date = 29 July 1918

| death_place = The Hague, Netherlands

| nationality = Dutch

| other_names =

| known_for =

| occupation = judge, politician

}}

Willem van der Kaay (originally van der Kaaij) (5 May 1831 – 29 July 1918) was a Dutch judge and liberal politician. He was a member of the House of Representatives for Alkmaar from 1875 to 1894, and served as Minister of Justice in Joan Röell's cabinet from 1874 to 1879.