diff --git a/NEWS.md b/NEWS.md
index b635e507fd78e..e838a3ed0e800 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -284,6 +284,9 @@ Deprecated or removed
 
   * The method `srand(rng, filename, n=4)` has been deprecated ([#21359]).
 
+  * `readcsv(io[, T::Type]; opts...)` has been deprecated in favor of
+    `readdlm(io, ','[, T]; opts...)` ([#23530]).
+
   * The `cholfact`/`cholfact!` methods that accepted an `uplo` symbol have been deprecated
     in favor of using `Hermitian` (or `Symmetric`) views ([#22187], [#22188]).
 
diff --git a/base/datafmt.jl b/base/datafmt.jl
index 04525ae9ad158..6ceecd14acf40 100644
--- a/base/datafmt.jl
+++ b/base/datafmt.jl
@@ -6,7 +6,7 @@ module DataFmt
 
 import Base: _default_delims, tryparse_internal, show
 
-export countlines, readdlm, readcsv, writedlm
+export countlines, readdlm, writedlm
 
 invalid_dlm(::Type{Char})   = reinterpret(Char, 0xfffffffe)
 invalid_dlm(::Type{UInt8})  = 0xfe
@@ -616,14 +616,6 @@ function dlm_parse(dbuff::String, eol::D, dlm::D, qchar::D, cchar::D,
     return (nrows, ncols)
 end
 
-"""
-    readcsv(source, [T::Type]; options...)
-
-Equivalent to [`readdlm`](@ref) with `delim` set to comma, and type optionally defined by `T`.
-"""
-readcsv(io; opts...)          = readdlm(io, ','; opts...)
-readcsv(io, T::Type; opts...) = readdlm(io, ',', T; opts...)
-
 # todo: keyword argument for # of digits to print
 writedlm_cell(io::IO, elt::AbstractFloat, dlm, quotes) = print_shortest(io, elt)
 function writedlm_cell(io::IO, elt::AbstractString, dlm::T, quotes::Bool) where T
diff --git a/base/deprecated.jl b/base/deprecated.jl
index 661276c56569c..65d99d763ac0f 100644
--- a/base/deprecated.jl
+++ b/base/deprecated.jl
@@ -1735,6 +1735,10 @@ function IOContext(io::IO; kws...)
     IOContext(io, (k=>v for (k, v) in kws)...)
 end
 
+# deprecate readcsv
+@deprecate readcsv(io; opts...) readdlm(io, ','; opts...)
+@deprecate readcsv(io, T::Type; opts...) readdlm(io, ',', T; opts...)
+
 @deprecate IOContext(io::IO, key, value) IOContext(io, key=>value)
 
 # PR #23485
diff --git a/base/exports.jl b/base/exports.jl
index 24548821f7c92..0b359c200e64a 100644
--- a/base/exports.jl
+++ b/base/exports.jl
@@ -1049,7 +1049,6 @@ export
     readavailable,
     readbytes!,
     readchomp,
-    readcsv,
     readdir,
     readdlm,
     readline,
diff --git a/doc/src/manual/packages.md b/doc/src/manual/packages.md
index ea024571f6f32..19a6f714a1cc5 100644
--- a/doc/src/manual/packages.md
+++ b/doc/src/manual/packages.md
@@ -811,7 +811,7 @@ the directory of the current source file. For example if `FooBar/src/FooBar.jl`
 
 ```julia
 datapath = joinpath(@__DIR__, "..", "data")
-foo = readcsv(joinpath(datapath, "foo.csv"))
+foo = readdlm(joinpath(datapath, "foo.csv"), ',')
 ```
 
 ### Making Your Package Available
diff --git a/doc/src/stdlib/io-network.md b/doc/src/stdlib/io-network.md
index 931cb3b55bc0d..22dc207996886 100644
--- a/doc/src/stdlib/io-network.md
+++ b/doc/src/stdlib/io-network.md
@@ -83,7 +83,6 @@ Base.DataFmt.readdlm(::Any, ::Char)
 Base.DataFmt.readdlm(::Any, ::Type)
 Base.DataFmt.readdlm(::Any)
 Base.DataFmt.writedlm
-Base.DataFmt.readcsv
 Base.Base64.Base64EncodePipe
 Base.Base64.Base64DecodePipe
 Base.Base64.base64encode
diff --git a/test/datafmt.jl b/test/datafmt.jl
index 95f0959e7b8ea..d5bdc45495466 100644
--- a/test/datafmt.jl
+++ b/test/datafmt.jl
@@ -18,18 +18,18 @@ isequaldlm(m1, m2, t) = isequal(m1, m2) && (eltype(m1) == eltype(m2) == t)
 @test isequaldlm(readdlm(IOBuffer("1\t2\n3\t4\n5\t6\n")), [1. 2; 3 4; 5 6], Float64)
 @test isequaldlm(readdlm(IOBuffer("1\t2\n3\t4\n5\t6\n"), Int), [1 2; 3 4; 5 6], Int)
 
-@test size(readcsv(IOBuffer("1,2,3,4"))) == (1,4)
-@test size(readcsv(IOBuffer("1,2,3,"))) == (1,4)
-@test size(readcsv(IOBuffer("1,2,3,4\n"))) == (1,4)
-@test size(readcsv(IOBuffer("1,2,3,\n"))) == (1,4)
-@test size(readcsv(IOBuffer("1,2,3,4\n1,2,3,4"))) == (2,4)
-@test size(readcsv(IOBuffer("1,2,3,4\n1,2,3,"))) == (2,4)
-@test size(readcsv(IOBuffer("1,2,3,4\n1,2,3"))) == (2,4)
-
-@test size(readcsv(IOBuffer("1,2,3,4\r\n"))) == (1,4)
-@test size(readcsv(IOBuffer("1,2,3,4\r\n1,2,3\r\n"))) == (2,4)
-@test size(readcsv(IOBuffer("1,2,3,4\r\n1,2,3,4\r\n"))) == (2,4)
-@test size(readcsv(IOBuffer("1,2,3,\"4\"\r\n1,2,3,4\r\n"))) == (2,4)
+@test size(readdlm(IOBuffer("1,2,3,4"), ',')) == (1,4)
+@test size(readdlm(IOBuffer("1,2,3,"), ',')) == (1,4)
+@test size(readdlm(IOBuffer("1,2,3,4\n"), ',')) == (1,4)
+@test size(readdlm(IOBuffer("1,2,3,\n"), ',')) == (1,4)
+@test size(readdlm(IOBuffer("1,2,3,4\n1,2,3,4"), ',')) == (2,4)
+@test size(readdlm(IOBuffer("1,2,3,4\n1,2,3,"), ',')) == (2,4)
+@test size(readdlm(IOBuffer("1,2,3,4\n1,2,3"), ',')) == (2,4)
+
+@test size(readdlm(IOBuffer("1,2,3,4\r\n"), ',')) == (1,4)
+@test size(readdlm(IOBuffer("1,2,3,4\r\n1,2,3\r\n"), ',')) == (2,4)
+@test size(readdlm(IOBuffer("1,2,3,4\r\n1,2,3,4\r\n"), ',')) == (2,4)
+@test size(readdlm(IOBuffer("1,2,3,\"4\"\r\n1,2,3,4\r\n"), ',')) == (2,4)
 
 @test size(readdlm(IOBuffer("1 2 3 4\n1 2 3"))) == (2,4)
 @test size(readdlm(IOBuffer("1\t2 3 4\n1 2 3"))) == (2,4)
@@ -73,11 +73,11 @@ let result1 = reshape(Any["t", "c", "", "c"], 2, 2),
     @test isequaldlm(readdlm(IOBuffer("t t \n\"\"\"c\" c")), result2, Any)
 end
 
-@test isequaldlm(readcsv(IOBuffer("\n1,2,3\n4,5,6\n\n\n"), skipblanks=false),
+@test isequaldlm(readdlm(IOBuffer("\n1,2,3\n4,5,6\n\n\n"), ',', skipblanks=false),
                  reshape(Any["",1.0,4.0,"","","",2.0,5.0,"","","",3.0,6.0,"",""], 5, 3), Any)
-@test isequaldlm(readcsv(IOBuffer("\n1,2,3\n4,5,6\n\n\n"), skipblanks=true), reshape([1.0,4.0,2.0,5.0,3.0,6.0], 2, 3), Float64)
-@test isequaldlm(readcsv(IOBuffer("1,2\n\n4,5"), skipblanks=false), reshape(Any[1.0,"",4.0,2.0,"",5.0], 3, 2), Any)
-@test isequaldlm(readcsv(IOBuffer("1,2\n\n4,5"), skipblanks=true), reshape([1.0,4.0,2.0,5.0], 2, 2), Float64)
+@test isequaldlm(readdlm(IOBuffer("\n1,2,3\n4,5,6\n\n\n"), ',', skipblanks=true), reshape([1.0,4.0,2.0,5.0,3.0,6.0], 2, 3), Float64)
+@test isequaldlm(readdlm(IOBuffer("1,2\n\n4,5"), ',', skipblanks=false), reshape(Any[1.0,"",4.0,2.0,"",5.0], 3, 2), Any)
+@test isequaldlm(readdlm(IOBuffer("1,2\n\n4,5"), ',', skipblanks=true), reshape([1.0,4.0,2.0,5.0], 2, 2), Float64)
 
 let x = bitrand(5, 10), io = IOBuffer()
     writedlm(io, x)
@@ -88,7 +88,7 @@ end
 let x = [1,2,3], y = [4,5,6], io = IOBuffer()
     writedlm(io, zip(x,y), ",  ")
     seek(io, 0)
-    @test readcsv(io) == [x y]
+    @test readdlm(io, ',') == [x y]
 end
 
 let x = [0.1 0.3 0.5], io = IOBuffer()
@@ -100,13 +100,13 @@ end
 let x = [0.1 0.3 0.5], io = IOBuffer()
     writedlm(io, x, ", ")
     seek(io, 0)
-    @test readcsv(io) == [0.1 0.3 0.5]
+    @test readdlm(io, ',') == [0.1 0.3 0.5]
 end
 
 let x = ["abc", "def\"ghi", "jk\nl"], y = [1, ",", "\"quoted\""], io = IOBuffer()
     writedlm(io, zip(x,y), ',')
     seek(io, 0)
-    @test readcsv(io) == [x y]
+    @test readdlm(io, ',') == [x y]
 end
 
 let x = ["a" "b"; "d" ""], io = IOBuffer()
@@ -124,12 +124,12 @@ let x = ["\"hello\"", "world\""], io = IOBuffer()
 end
 
 # test comments
-@test isequaldlm(readcsv(IOBuffer("#this is comment\n1,2,3\n#one more comment\n4,5,6")), [1. 2. 3.;4. 5. 6.], Float64)
-@test isequaldlm(readcsv(IOBuffer("#this is \n#comment\n1,2,3\n#one more \n#comment\n4,5,6")), [1. 2. 3.;4. 5. 6.], Float64)
-@test isequaldlm(readcsv(IOBuffer("1,2,#3\n4,5,6")), [1. 2. "";4. 5. 6.], Any)
-@test isequaldlm(readcsv(IOBuffer("1#,2,3\n4,5,6")), [1. "" "";4. 5. 6.], Any)
-@test isequaldlm(readcsv(IOBuffer("1,2,\"#3\"\n4,5,6")), [1. 2. "#3";4. 5. 6.], Any)
-@test isequaldlm(readcsv(IOBuffer("1,2,3\n #with leading whitespace\n4,5,6")), [1. 2. 3.;" " "" "";4. 5. 6.], Any)
+@test isequaldlm(readdlm(IOBuffer("#this is comment\n1,2,3\n#one more comment\n4,5,6"), ','), [1. 2. 3.;4. 5. 6.], Float64)
+@test isequaldlm(readdlm(IOBuffer("#this is \n#comment\n1,2,3\n#one more \n#comment\n4,5,6"), ','), [1. 2. 3.;4. 5. 6.], Float64)
+@test isequaldlm(readdlm(IOBuffer("1,2,#3\n4,5,6"), ','), [1. 2. "";4. 5. 6.], Any)
+@test isequaldlm(readdlm(IOBuffer("1#,2,3\n4,5,6"), ','), [1. "" "";4. 5. 6.], Any)
+@test isequaldlm(readdlm(IOBuffer("1,2,\"#3\"\n4,5,6"), ','), [1. 2. "#3";4. 5. 6.], Any)
+@test isequaldlm(readdlm(IOBuffer("1,2,3\n #with leading whitespace\n4,5,6"), ','), [1. 2. 3.;" " "" "";4. 5. 6.], Any)
 
 # test skipstart
 let x = ["a" "b" "c"; "d" "e" "f"; "g" "h" "i"; "A" "B" "C"; 1 2 3; 4 5 6; 7 8 9], io = IOBuffer()
@@ -213,21 +213,21 @@ let i18n_data = ["Origin (English)", "Name (English)", "Origin (Native)", "Name
     i18n_arr = permutedims(reshape(i18n_data, 4, Int(floor(length(i18n_data)/4))), [2, 1])
     i18n_buff = PipeBuffer()
     writedlm(i18n_buff, i18n_arr, ',')
-    @test i18n_arr == readcsv(i18n_buff)
+    @test i18n_arr == readdlm(i18n_buff, ',')
 
     hdr = i18n_arr[1:1, :]
     data = i18n_arr[2:end, :]
     writedlm(i18n_buff, i18n_arr, ',')
-    @test (data, hdr) == readcsv(i18n_buff, header=true)
+    @test (data, hdr) == readdlm(i18n_buff, ',', header=true)
 
     writedlm(i18n_buff, i18n_arr, '\t')
     @test (data, hdr) == readdlm(i18n_buff, '\t', header=true)
 end
 
-@test isequaldlm(readcsv(IOBuffer("1,22222222222222222222222222222222222222,0x3,10e6\n2000.1,true,false,-10.34"), Any),
+@test isequaldlm(readdlm(IOBuffer("1,22222222222222222222222222222222222222,0x3,10e6\n2000.1,true,false,-10.34"), ',', Any),
     reshape(Any[1,2000.1,Float64(22222222222222222222222222222222222222),true,0x3,false,10e6,-10.34], 2, 4), Any)
 
-@test isequaldlm(readcsv(IOBuffer("-9223355253176920979,9223355253176920979"), Int64), Int64[-9223355253176920979  9223355253176920979], Int64)
+@test isequaldlm(readdlm(IOBuffer("-9223355253176920979,9223355253176920979"), ',', Int64), Int64[-9223355253176920979  9223355253176920979], Int64)
 
 # fix #13028
 for data in ["A B C", "A B C\n"]
@@ -253,13 +253,13 @@ for writefunc in ((io,x) -> show(io, "text/csv", x),
     let x = [(1,2), (3,4)], io = IOBuffer()
         writefunc(io, x)
         seek(io, 0)
-        @test readcsv(io) == [1 2; 3 4]
+        @test readdlm(io, ',') == [1 2; 3 4]
     end
     # vectors of strings:
     let x = ["foo", "bar"], io = IOBuffer()
         writefunc(io, x)
         seek(io, 0)
-        @test vec(readcsv(io)) == x
+        @test vec(readdlm(io, ',')) == x
     end
 end
 
@@ -275,12 +275,12 @@ end
 
 # issue #21180
 let data = "\"721\",\"1438\",\"1439\",\"…\",\"1\""
-    @test readcsv(IOBuffer(data)) == Any[721  1438  1439  "…"  1]
+    @test readdlm(IOBuffer(data), ',') == Any[721  1438  1439  "…"  1]
 end
 
 # issue #21207
 let data = "\"1\",\"灣\"\"灣灣灣灣\",\"3\""
-    @test readcsv(IOBuffer(data)) == Any[1 "灣\"灣灣灣灣" 3]
+    @test readdlm(IOBuffer(data), ',') == Any[1 "灣\"灣灣灣灣" 3]
 end
 
 # issue #11484: useful error message for invalid readdlm filepath arguments
diff --git a/test/read.jl b/test/read.jl
index e3b8cf002887e..ba82a26aaaef6 100644
--- a/test/read.jl
+++ b/test/read.jl
@@ -261,9 +261,9 @@ for (name, f) in l
         verbose && println("$name countlines...")
         @test countlines(io()) == countlines(IOBuffer(text))
 
-        verbose && println("$name readcsv...")
-        @test readcsv(io()) == readcsv(IOBuffer(text))
-        @test readcsv(io()) == readcsv(filename)
+        verbose && println("$name readdlm...")
+        @test readdlm(io(), ',') == readdlm(IOBuffer(text), ',')
+        @test readdlm(io(), ',') == readdlm(filename, ',')
 
         cleanup()
     end