Heathcote Brook

{{Use American English|date=February 2025}}

{{Infobox river

| name = Heathcote Brook

| image = Former Kingston Branch railroad at Heathcote Branch, Aug. 2023.jpg

| image_alt =

| image_caption = Heathcote Brook at former Kingston Branch railroad bridge

| map = Heathcote Brook.JPG

| map_alt =

| map_caption = Heathcote Brook map

| source1_location =

| source1_coordinates= {{coord|40|24|32|N|74|33|34|W}}

| mouth_location =

| mouth_coordinates = {{coord|40|22|25|N|74|37|12|W|display=inline,title}}

| subdivision_type1 = Country

| subdivision_name1 = United States

| progression = Millstone River, Raritan River, Atlantic Ocean

| length =

| source1_elevation =

| mouth_elevation = {{convert|52|ft|m|abbr=on}}

| discharge1_avg =

| basin_size =

| river_system = Raritan River system

| tributaries_left = Carters Brook, Heathcote Brook Branch

| tributaries_right =

}}

Heathcote Brook, also known as Heathcote Run, is a tributary of the Millstone River in central New Jersey in the United States.