Hopper Gristmill Site

{{Use mdy dates|date=August 2023}}

{{Infobox NRHP

| name = Hopper Gristmill Site

| nrhp_type =

| image = MahwahNJ_HopperMillSite.jpg

| caption = View of the Ramapo River near the site marker

| location = near 156 Ramapo Valley Rd., Mahwah, New Jersey{{cite web|url=http://www.mahwahtwp.org/documents/mahwah%20historic%20sites%20web%20brochure.pdf|title=Historic Sites Brochure|publisher=Mahwah Township|accessdate=2017-11-09}}

| coordinates = {{coord|41|6|0|N|74|9|31|W|display=inline,title}}

| locmapin = USA New Jersey Bergen County#New Jersey#USA

| built = 1764

| architect =

| architecture =

| added = March 3, 1983

| area = {{convert|0.5|acre}}

| refnum = 83001524{{NRISref|2009a}}

| designated_other1_name = New Jersey Register of Historic Places

| designated_other1_abbr = NJRHP

| designated_other1_link = New Jersey Register of Historic Places

| designated_other1_date = November 6, 1980

| designated_other1_number = 564{{cite web|title=New Jersey and National Registers of Historic Places - Bergen County |url=http://www.state.nj.us/dep/hpo/1identify/lists/bergen.pdf |publisher=New Jersey Department of Environmental Protection - Historic Preservation Office |page=19 |date=July 7, 2009 |accessdate=March 27, 2010 |url-status=dead |archiveurl=https://web.archive.org/web/20081030005640/http://www.state.nj.us/dep/hpo/1identify/lists/bergen.pdf |archivedate=October 30, 2008 }}

| designated_other1_num_position = bottom

| designated_other1_color = #ffc94b

}}

Hopper Gristmill Site is located near 156 Ramapo Valley Road in Mahwah, Bergen County, New Jersey, United States. The gristmill was built in 1764 and was added to the National Register of Historic Places on March 3, 1983.