List of number-one singles of 2018 (Portugal)

The Portuguese Singles Chart ranks the best-performing singles in Portugal, as compiled by the Associação Fonográfica Portuguesa.

Week	Song	Artist	Reference
1/2018	"Rockstar"	Post Malone featuring 21 Savage	[1]
2/2018			[2]
3/2018	"Havana"	Camila Cabello featuring Young Thug	[3]
4/2018			[4]
5/2018	"God's Plan"	Drake	[5]
6/2018			[6]
7/2018			[7]
8/2018			[8]
9/2018			[9]
10/2018			[10]
11/2018			[11]
12/2018			[12]
13/2018			[13]
14/2018			[14]
15/2018			[15]
16/2018	"Faz Gostoso"	Blaya	[16]
17/2018	"No Tears Left to Cry"	Ariana Grande	[17]
18/2018	"Faz Gostoso"	Blaya	[18]
19/2018			[19]
20/2018			[20]
21/2018			[21]
22/2018	"One Kiss"	Calvin Harris and Dua Lipa	[22]
23/2018			[23]
24/2018			[24]
25/2018			[25]
26/2018	"Sad!"	XXXTentacion	[26]
27/2018			[27]
28/2018	"X"	Nicky Jam and J Balvin	[28]
29/2018	"In My Feelings"	Drake	[29]
30/2018			[30]
31/2018			[31]
32/2018			[32]
33/2018			[33]
34/2018			[34]
35/2018			[35]
36/2018			[36]
37/2018			[37]
38/2018	"Mafiosa"	Lartiste featuring Caroliina	[38]
39/2018	"Cafeína"	DJ Dadda featuring Plutónio	[39]
40/2018			[40]
41/2018			[41]
42/2018	"Taki Taki"	DJ Snake featuring Selena Gomez, Ozuna and Cardi B	[42]
43/2018			[43]
44/2018			[44]
45/2018			[45]
46/2018	"Thank U, Next"	Ariana Grande	[46]
47/2018	"Shallow"	Lady Gaga and Bradley Cooper	[47]
48/2018			[48]
49/2018	"Thank U, Next"	Ariana Grande	[49]
50/2018			[50]
51/2018			[51]
52/2018	"All I Want for Christmas Is You"	Mariah Carey	[52]