diff --git a/NAMESPACE b/NAMESPACE
index 58d150f7..0e096ecc 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -30,6 +30,7 @@ export(is_projectile_project)
 export(is_quarto_project)
 export(is_r_package)
 export(is_remake_project)
+export(is_renv_project)
 export(is_root_criterion)
 export(is_rstudio_project)
 export(is_svn_root)
diff --git a/R/root.R b/R/root.R
index fbb55c07..7d925db2 100644
--- a/R/root.R
+++ b/R/root.R
@@ -321,6 +321,9 @@ is_drake_project <- has_dir(".drake")
 #' @export
 is_pkgdown_project <- has_file("_pkgdown.yml") | has_file("_pkgdown.yaml") | has_file("pkgdown/_pkgdown.yml") | has_file("inst/_pkgdown.yml")
 
+#' @export
+is_renv_project <- has_file("renv.lock", contents = '"Packages":\\s*\\{')
+
 #' @export
 is_projectile_project <- has_file(".projectile")
 
@@ -355,6 +358,7 @@ criteria <- structure(
     is_r_package = is_r_package,
     is_remake_project = is_remake_project,
     is_pkgdown_project = is_pkgdown_project,
+    is_renv_project = is_renv_project,
     is_projectile_project = is_projectile_project,
     is_quarto_project = is_quarto_project,
     is_git_root = is_git_root,
@@ -412,6 +416,14 @@ str.root_criteria <- function(object, ...) {
 #' @export
 "is_pkgdown_project"
 
+#' @details
+#' `is_renv_project` looks for an `renv.lock` file.
+#'
+#' @format NULL
+#' @rdname criteria
+#' @export
+"is_renv_project"
+
 #' @details
 #' `is_projectile_project` looks for a `.projectile` file.
 #'
diff --git a/man/criteria.Rd b/man/criteria.Rd
index 5a89d224..4424ddc5 100644
--- a/man/criteria.Rd
+++ b/man/criteria.Rd
@@ -8,6 +8,7 @@
 \alias{is_remake_project}
 \alias{is_drake_project}
 \alias{is_pkgdown_project}
+\alias{is_renv_project}
 \alias{is_projectile_project}
 \alias{is_quarto_project}
 \alias{is_git_root}
@@ -29,6 +30,8 @@ is_drake_project
 
 is_pkgdown_project
 
+is_renv_project
+
 is_projectile_project
 
 is_quarto_project
@@ -57,6 +60,8 @@ This is a collection of commonly used root criteria.
 
 \code{is_pkgdown_project} looks for a \verb{_pkgdown.yml}, \verb{_pkgdown.yaml}, \verb{pkgdown/_pkgdown.yml} and/or \verb{inst/_pkgdown.yml} file.
 
+\code{is_renv_project} looks for an \code{renv.lock} file.
+
 \code{is_projectile_project} looks for a \code{.projectile} file.
 
 \code{is_quarto_project} looks for a \verb{_quarto.yml} file.
diff --git a/tests/testthat/_snaps/root.md b/tests/testthat/_snaps/root.md
index c82a107b..14063cd3 100644
--- a/tests/testthat/_snaps/root.md
+++ b/tests/testthat/_snaps/root.md
@@ -57,6 +57,9 @@
       - contains a file "pkgdown/_pkgdown.yml"
       - contains a file "inst/_pkgdown.yml"
       
+      $is_renv_project
+      Root criterion: contains a file "renv.lock" with contents matching ""Packages":\s*\{"
+      
       $is_projectile_project
       Root criterion: contains a file ".projectile"
       
@@ -91,11 +94,12 @@
     Code
       str(criteria)
     Output
-      List of 11
+      List of 12
        $ is_rstudio_project   : chr "Root criterion: contains a file matching \"[.]Rproj$\" with contents matching \"^Version: \" in the first line"
        $ is_r_package         : chr "Root criterion: contains a file \"DESCRIPTION\" with contents matching \"^Package: \""
        $ is_remake_project    : chr "Root criterion: contains a file \"remake.yml\""
        $ is_pkgdown_project   : chr [1:5] "Root criterion: one of" "- contains a file \"_pkgdown.yml\"" "- contains a file \"_pkgdown.yaml\"" "- contains a file \"pkgdown/_pkgdown.yml\"" ...
+       $ is_renv_project      : chr "Root criterion: contains a file \"renv.lock\" with contents matching \"\"Packages\":\\s*\\{\""
        $ is_projectile_project: chr "Root criterion: contains a file \".projectile\""
        $ is_quarto_project    : chr "Root criterion: contains a file \"_quarto.yml\""
        $ is_git_root          : chr [1:3] "Root criterion: one of" "- contains a directory \".git\"" "- contains a file \".git\" with contents matching \"^gitdir: \""