Bundesstraße 73

{{Short description|Federal highway in Germany}}

{{RJL|date=December 2021}}

{{Infobox road

| country = DEU

| type = B

| route = 73

| map = B073 Verlauf.svg

| map_notes =

| length_km = 100

| direction_a = Northwest

| terminus_a = Cuxhaven

| direction_b = Southeast

| terminus_b = Hamburg

| states = Lower Saxony, Hamburg

| junction = {{Bundesstraße 73}}

}}

The Bundesstraße 73 or B73 is a German federal highway running in a northwesterly to southeasterly direction from Cuxhaven to Hamburg. It runs partially beside the Bundesautobahn 26.