Rank	City	2020 Population	Growth Rate (Annual)
1	Wilmington	70,875	0.0%
2	Dover	39,554	0.9%
3	Newark	31,296	-0.1%
4	Middletown	23,315	2.1%
5	Smyrna	12,940	2.6%
6	Milford	11,301	1.7%
7	Seaford	7,983	1.4%
8	Georgetown	7,167	1.1%
9	Millsboro	6,900	5.9%
10	Elsmere	6,203	0.1%
11	New Castle	5,533	0.5%
12	Clayton	3,979	3.1%
13	Laurel	3,903	0.5%
14	Harrington	3,769	0.6%
15	Camden	3,719	0.7%
16	Milton	3,312	2.5%
17	Lewes	3,311	1.9%
18	Selbyville	2,898	2.9%
19	Townsend	2,735	2.9%
20	Ocean View	2,656	3.5%
21	Bridgeville	2,576	2.3%
22	Delmar	2,034	2.4%
23	Cheswold	1,929	3.4%
24	Delaware City	1,877	1.0%
25	Millville	1,841	13.0%
26	Wyoming	1,702	2.6%
27	Felton	1,315	0.1%
28	Bellefonte	1,221	0.2%
29	Blades	1,189	-0.4%
30	Rehoboth Beach	1,113	-1.7%
31	Frederica	1,076	3.3%
32	Greenwood	991	0.2%
33	Bethany Beach	963	-1.0%
34	Newport	901	-1.6%
35	Dagsboro	878	0.9%
36	Frankford	798	-0.6%
37	Ellendale	493	2.6%
38	South Bethany	457	0.2%
39	Arden	428	-0.3%
40	Houston	388	0.4%
41	Odessa	364	–
42	Dewey Beach	360	0.5%
43	Fenwick Island	344	-1.0%
44	Bowers	276	-1.9%
45	Magnolia	275	2.0%
46	Ardentown	254	-0.4%
47	Bethel	240	3.4%
48	Ardencroft	226	-0.2%
49	Slaughter Beach	219	0.6%
50	Kenton	212	-2.1%
51	Little Creek	193	-1.5%
52	Woodside	189	0.4%
53	Leipsic	179	-0.2%
54	Viola	140	-1.1%
55	Henlopen Acres	139	1.3%
56	Farmington	91	-1.9%
57	Hartly	71	-0.4%